Javascript Object Signing and Encryption F. Skokan Internet-Draft Okta Intended status: Standards Track B. Campbell Expires: 12 August 2026 Ping Identity 8 February 2026 JOSE HPKE PQ & PQ/T Algorithm Registrations draft-skokan-jose-hpke-pq-pqt-03 Abstract This document registers Post-Quantum (PQ) and Post-Quantum/ Traditional (PQ/T) hybrid algorithm identifiers for use with JSON Object Signing and Encryption (JOSE), building on the Hybrid Public Key Encryption (HPKE) framework. About This Document This note is to be removed before publishing as an RFC. The latest revision of this draft can be found at https://panva.github.io/jose-hpke-pq-pqt/draft-skokan-jose-hpke-pq- pqt.html. Status information for this document may be found at https://datatracker.ietf.org/doc/draft-skokan-jose-hpke-pq-pqt/. Discussion of this document takes place on the Javascript Object Signing and Encryption Working Group mailing list (mailto:jose@ietf.org), which is archived at https://mailarchive.ietf.org/arch/browse/jose/. Subscribe at https://www.ietf.org/mailman/listinfo/jose/. Source for this draft and an issue tracker can be found at https://github.com/panva/jose-hpke-pq-pqt. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Skokan & Campbell Expires 12 August 2026 [Page 1] Internet-Draft JOSE HPKE PQ February 2026 Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on 12 August 2026. Copyright Notice Copyright (c) 2026 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/ license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Conventions and Definitions . . . . . . . . . . . . . . . . . 3 3. Algorithm Identifiers . . . . . . . . . . . . . . . . . . . . 3 3.1. PQ/T Hybrid Integrated Encryption Algorithms . . . . . . 3 3.2. Pure PQ Integrated Encryption Algorithms . . . . . . . . 4 3.3. PQ/T Hybrid Key Encryption Algorithms . . . . . . . . . . 5 3.4. Pure PQ Key Encryption Algorithms . . . . . . . . . . . . 6 4. JSON Web Key Representation . . . . . . . . . . . . . . . . . 7 5. Security Considerations . . . . . . . . . . . . . . . . . . . 7 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8 6.1. JSON Web Signature and Encryption Algorithms Registry . . 8 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 15 7.1. Normative References . . . . . . . . . . . . . . . . . . 15 7.2. Informative References . . . . . . . . . . . . . . . . . 15 Appendix A. Test Vectors . . . . . . . . . . . . . . . . . . . . 16 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 27 Document History . . . . . . . . . . . . . . . . . . . . . . . . 27 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 28 1. Introduction [I-D.ietf-jose-hpke-encrypt] defines how to use Hybrid Public Key Encryption (HPKE) with JSON Web Encryption (JWE) using traditional Key Encapsulation Mechanisms (KEM) based on Elliptic-curve Diffie- Hellman (ECDH). Skokan & Campbell Expires 12 August 2026 [Page 2] Internet-Draft JOSE HPKE PQ February 2026 This document extends the set of registered HPKE algorithms to include Post-Quantum (PQ) and Post-Quantum/Traditional (PQ/T) hybrid KEMs, as defined in [I-D.ietf-hpke-pq]. These algorithms provide protection against attacks by cryptographically relevant quantum computers. The term “PQ/T hybrid” is used here consistent with [I-D.ietf-hpke-pq] to denote a combination of post-quantum and traditional algorithms, and should not be confused with HPKE's use of "hybrid" to describe the combination of asymmetric and symmetric encryption. 2. Conventions and Definitions The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here. 3. Algorithm Identifiers This section defines the algorithm identifiers for PQ and PQ/T HPKE- based encryption in JOSE. Each algorithm is defined by a combination of an HPKE KEM, a Key Derivation Function (KDF), and an Authenticated Encryption with Associated Data (AEAD) algorithm. All algorithms defined in this section follow the same operational model as those in [I-D.ietf-jose-hpke-encrypt], supporting both integrated encryption as defined in Section 5 of [I-D.ietf-jose-hpke-encrypt] and key encryption as defined in Section 6 of [I-D.ietf-jose-hpke-encrypt]. Test vectors for all algorithms defined in this section are provided in Appendix A. 3.1. PQ/T Hybrid Integrated Encryption Algorithms The following table lists the algorithm identifiers for PQ/T hybrid integrated encryption, where HPKE directly encrypts the plaintext without a separate Content Encryption Key: Skokan & Campbell Expires 12 August 2026 [Page 3] Internet-Draft JOSE HPKE PQ February 2026 +=============+=================+==========+==================+ | "alg" value | HPKE KEM | HPKE KDF | HPKE AEAD | +=============+=================+==========+==================+ | HPKE-8 | MLKEM768-P256 | SHAKE256 | AES-256-GCM | | | (0x0050) | (0x0011) | (0x0002) | +-------------+-----------------+----------+------------------+ | HPKE-9 | MLKEM768-P256 | SHAKE256 | ChaCha20Poly1305 | | | (0x0050) | (0x0011) | (0x0003) | +-------------+-----------------+----------+------------------+ | HPKE-10 | MLKEM768-X25519 | SHAKE256 | AES-256-GCM | | | (0x647a) | (0x0011) | (0x0002) | +-------------+-----------------+----------+------------------+ | HPKE-11 | MLKEM768-X25519 | SHAKE256 | ChaCha20Poly1305 | | | (0x647a) | (0x0011) | (0x0003) | +-------------+-----------------+----------+------------------+ | HPKE-12 | MLKEM1024-P384 | SHAKE256 | AES-256-GCM | | | (0x0051) | (0x0011) | (0x0002) | +-------------+-----------------+----------+------------------+ | HPKE-13 | MLKEM1024-P384 | SHAKE256 | ChaCha20Poly1305 | | | (0x0051) | (0x0011) | (0x0003) | +-------------+-----------------+----------+------------------+ Table 1: PQ/T Hybrid Integrated Encryption Algorithms These algorithms combine ML-KEM with a traditional elliptic curve algorithm in a PQ/T hybrid KEM construction, with the goal that compromise of either the post-quantum or the traditional component alone does not undermine the security of the resulting encryption. 3.2. Pure PQ Integrated Encryption Algorithms The following table lists the algorithm identifiers for pure post- quantum integrated encryption: Skokan & Campbell Expires 12 August 2026 [Page 4] Internet-Draft JOSE HPKE PQ February 2026 +=============+=====================+==========+==================+ | "alg" value | HPKE KEM | HPKE KDF | HPKE AEAD | +=============+=====================+==========+==================+ | HPKE-14 | ML-KEM-768 (0x0041) | SHAKE256 | AES-256-GCM | | | | (0x0011) | (0x0002) | +-------------+---------------------+----------+------------------+ | HPKE-15 | ML-KEM-768 (0x0041) | SHAKE256 | ChaCha20Poly1305 | | | | (0x0011) | (0x0003) | +-------------+---------------------+----------+------------------+ | HPKE-16 | ML-KEM-1024 | SHAKE256 | AES-256-GCM | | | (0x0042) | (0x0011) | (0x0002) | +-------------+---------------------+----------+------------------+ | HPKE-17 | ML-KEM-1024 | SHAKE256 | ChaCha20Poly1305 | | | (0x0042) | (0x0011) | (0x0003) | +-------------+---------------------+----------+------------------+ Table 2: Pure PQ Integrated Encryption Algorithms These algorithms provide pure post-quantum security using ML-KEM without a traditional algorithm component. 3.3. PQ/T Hybrid Key Encryption Algorithms The following table lists the algorithm identifiers for PQ/T hybrid key encryption, where HPKE encrypts the Content Encryption Key: Skokan & Campbell Expires 12 August 2026 [Page 5] Internet-Draft JOSE HPKE PQ February 2026 +=============+=================+==========+==================+ | "alg" value | HPKE KEM | HPKE KDF | HPKE AEAD | +=============+=================+==========+==================+ | HPKE-8-KE | MLKEM768-P256 | SHAKE256 | AES-256-GCM | | | (0x0050) | (0x0011) | (0x0002) | +-------------+-----------------+----------+------------------+ | HPKE-9-KE | MLKEM768-P256 | SHAKE256 | ChaCha20Poly1305 | | | (0x0050) | (0x0011) | (0x0003) | +-------------+-----------------+----------+------------------+ | HPKE-10-KE | MLKEM768-X25519 | SHAKE256 | AES-256-GCM | | | (0x647a) | (0x0011) | (0x0002) | +-------------+-----------------+----------+------------------+ | HPKE-11-KE | MLKEM768-X25519 | SHAKE256 | ChaCha20Poly1305 | | | (0x647a) | (0x0011) | (0x0003) | +-------------+-----------------+----------+------------------+ | HPKE-12-KE | MLKEM1024-P384 | SHAKE256 | AES-256-GCM | | | (0x0051) | (0x0011) | (0x0002) | +-------------+-----------------+----------+------------------+ | HPKE-13-KE | MLKEM1024-P384 | SHAKE256 | ChaCha20Poly1305 | | | (0x0051) | (0x0011) | (0x0003) | +-------------+-----------------+----------+------------------+ Table 3: PQ/T Hybrid Key Encryption Algorithms These are the key encryption counterparts of the PQ/T hybrid integrated encryption algorithms defined in Table 1. 3.4. Pure PQ Key Encryption Algorithms The following table lists the algorithm identifiers for pure post- quantum key encryption: Skokan & Campbell Expires 12 August 2026 [Page 6] Internet-Draft JOSE HPKE PQ February 2026 +=============+=====================+==========+==================+ | "alg" value | HPKE KEM | HPKE KDF | HPKE AEAD | +=============+=====================+==========+==================+ | HPKE-14-KE | ML-KEM-768 (0x0041) | SHAKE256 | AES-256-GCM | | | | (0x0011) | (0x0002) | +-------------+---------------------+----------+------------------+ | HPKE-15-KE | ML-KEM-768 (0x0041) | SHAKE256 | ChaCha20Poly1305 | | | | (0x0011) | (0x0003) | +-------------+---------------------+----------+------------------+ | HPKE-16-KE | ML-KEM-1024 | SHAKE256 | AES-256-GCM | | | (0x0042) | (0x0011) | (0x0002) | +-------------+---------------------+----------+------------------+ | HPKE-17-KE | ML-KEM-1024 | SHAKE256 | ChaCha20Poly1305 | | | (0x0042) | (0x0011) | (0x0003) | +-------------+---------------------+----------+------------------+ Table 4: Pure PQ Key Encryption Algorithms These are the key encryption counterparts of the pure PQ integrated encryption algorithms defined in Table 2. 4. JSON Web Key Representation Keys for the algorithms defined in this document use the "AKP" (Algorithm Key Pair) key type defined in [I-D.ietf-cose-dilithium]. For the algorithms in this document, the "pub" parameter contains the base64url encoding of HPKE's SerializePublicKey() output for the corresponding KEM, and the "priv" parameter contains the base64url encoding of HPKE's SerializePrivateKey() output. Examples of JWKs for each algorithm are provided in Appendix A. 5. Security Considerations The security considerations of [I-D.ietf-jose-hpke-encrypt] and [I-D.ietf-hpke-pq] apply to this document. This document does not register algorithms using ML-KEM-512. As noted in Section 3 of [I-D.ietf-hpke-pq], given the relative novelty of ML-KEM, there is concern that new cryptanalysis might reduce the security level of ML-KEM-512. Use of ML-KEM-768 or ML-KEM-1024 acts as a hedge against such cryptanalysis at a modest performance penalty. Skokan & Campbell Expires 12 August 2026 [Page 7] Internet-Draft JOSE HPKE PQ February 2026 6. IANA Considerations 6.1. JSON Web Signature and Encryption Algorithms Registry This document requests registration of the following values in the IANA "JSON Web Signature and Encryption Algorithms" registry established by [RFC7518]: 6.1.1. HPKE-8 * Algorithm Name: HPKE-8 * Algorithm Description: Integrated Encryption with HPKE using MLKEM768-P256 KEM, SHAKE256 KDF, and AES-256-GCM AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 1 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.2. HPKE-8-KE * Algorithm Name: HPKE-8-KE * Algorithm Description: Key Encryption with HPKE using MLKEM768-P256 KEM, SHAKE256 KDF, and AES-256-GCM AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 3 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.3. HPKE-9 * Algorithm Name: HPKE-9 * Algorithm Description: Integrated Encryption with HPKE using MLKEM768-P256 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD Skokan & Campbell Expires 12 August 2026 [Page 8] Internet-Draft JOSE HPKE PQ February 2026 * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 1 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.4. HPKE-9-KE * Algorithm Name: HPKE-9-KE * Algorithm Description: Key Encryption with HPKE using MLKEM768-P256 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 3 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.5. HPKE-10 * Algorithm Name: HPKE-10 * Algorithm Description: Integrated Encryption with HPKE using MLKEM768-X25519 KEM, SHAKE256 KDF, and AES-256-GCM AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 1 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.6. HPKE-10-KE * Algorithm Name: HPKE-10-KE Skokan & Campbell Expires 12 August 2026 [Page 9] Internet-Draft JOSE HPKE PQ February 2026 * Algorithm Description: Key Encryption with HPKE using MLKEM768-X25519 KEM, SHAKE256 KDF, and AES-256-GCM AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 3 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.7. HPKE-11 * Algorithm Name: HPKE-11 * Algorithm Description: Integrated Encryption with HPKE using MLKEM768-X25519 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 1 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.8. HPKE-11-KE * Algorithm Name: HPKE-11-KE * Algorithm Description: Key Encryption with HPKE using MLKEM768-X25519 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 3 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] Skokan & Campbell Expires 12 August 2026 [Page 10] Internet-Draft JOSE HPKE PQ February 2026 6.1.9. HPKE-12 * Algorithm Name: HPKE-12 * Algorithm Description: Integrated Encryption with HPKE using MLKEM1024-P384 KEM, SHAKE256 KDF, and AES-256-GCM AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 1 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.10. HPKE-12-KE * Algorithm Name: HPKE-12-KE * Algorithm Description: Key Encryption with HPKE using MLKEM1024-P384 KEM, SHAKE256 KDF, and AES-256-GCM AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 3 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.11. HPKE-13 * Algorithm Name: HPKE-13 * Algorithm Description: Integrated Encryption with HPKE using MLKEM1024-P384 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 1 of this document Skokan & Campbell Expires 12 August 2026 [Page 11] Internet-Draft JOSE HPKE PQ February 2026 * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.12. HPKE-13-KE * Algorithm Name: HPKE-13-KE * Algorithm Description: Key Encryption with HPKE using MLKEM1024-P384 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 3 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.13. HPKE-14 * Algorithm Name: HPKE-14 * Algorithm Description: Integrated Encryption with HPKE using ML- KEM-768 KEM, SHAKE256 KDF, and AES-256-GCM AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 2 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.14. HPKE-14-KE * Algorithm Name: HPKE-14-KE * Algorithm Description: Key Encryption with HPKE using ML-KEM-768 KEM, SHAKE256 KDF, and AES-256-GCM AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF Skokan & Campbell Expires 12 August 2026 [Page 12] Internet-Draft JOSE HPKE PQ February 2026 * Specification Document(s): Table 4 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.15. HPKE-15 * Algorithm Name: HPKE-15 * Algorithm Description: Integrated Encryption with HPKE using ML- KEM-768 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 2 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.16. HPKE-15-KE * Algorithm Name: HPKE-15-KE * Algorithm Description: Key Encryption with HPKE using ML-KEM-768 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 4 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.17. HPKE-16 * Algorithm Name: HPKE-16 * Algorithm Description: Integrated Encryption with HPKE using ML- KEM-1024 KEM, SHAKE256 KDF, and AES-256-GCM AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional Skokan & Campbell Expires 12 August 2026 [Page 13] Internet-Draft JOSE HPKE PQ February 2026 * Change Controller: IETF * Specification Document(s): Table 2 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.18. HPKE-16-KE * Algorithm Name: HPKE-16-KE * Algorithm Description: Key Encryption with HPKE using ML-KEM-1024 KEM, SHAKE256 KDF, and AES-256-GCM AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 4 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.19. HPKE-17 * Algorithm Name: HPKE-17 * Algorithm Description: Integrated Encryption with HPKE using ML- KEM-1024 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD * Algorithm Usage Location(s): "alg" * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 2 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 6.1.20. HPKE-17-KE * Algorithm Name: HPKE-17-KE * Algorithm Description: Key Encryption with HPKE using ML-KEM-1024 KEM, SHAKE256 KDF, and ChaCha20Poly1305 AEAD * Algorithm Usage Location(s): "alg" Skokan & Campbell Expires 12 August 2026 [Page 14] Internet-Draft JOSE HPKE PQ February 2026 * JOSE Implementation Requirements: Optional * Change Controller: IETF * Specification Document(s): Table 4 of this document * Algorithm Analysis Document(s): [I-D.ietf-hpke-pq] 7. References 7.1. Normative References [I-D.ietf-cose-dilithium] Prorock, M. and O. Steele, "ML-DSA for JOSE and COSE", Work in Progress, Internet-Draft, draft-ietf-cose- dilithium-11, 15 November 2025, . [I-D.ietf-hpke-pq] Barnes, R. and D. Connolly, "Post-Quantum and Post- Quantum/Traditional Hybrid Algorithms for HPKE", Work in Progress, Internet-Draft, draft-ietf-hpke-pq-03, 6 November 2025, . [I-D.ietf-jose-hpke-encrypt] Reddy.K, T., Tschofenig, H., Banerjee, A., Steele, O., and M. B. Jones, "Use of Hybrid Public Key Encryption (HPKE) with JSON Web Encryption (JWE)", Work in Progress, Internet-Draft, draft-ietf-jose-hpke-encrypt-15, 30 November 2025, . [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . 7.2. Informative References [RFC7518] Jones, M., "JSON Web Algorithms (JWA)", RFC 7518, DOI 10.17487/RFC7518, May 2015, . Skokan & Campbell Expires 12 August 2026 [Page 15] Internet-Draft JOSE HPKE PQ February 2026 Appendix A. Test Vectors This appendix provides test vectors for each algorithm defined in this document. For each algorithm, a private JWK, a Flattened JWE JSON Serialization example with Additional Authenticated Data, and a JWE Compact Serialization example are provided. A.1. HPKE-8 { "kty": "AKP", "alg": "HPKE-8", "kid": "DmOWQi-VwrjZWjO6mQQWdv3CJ_v9k_PH3vS7S0xoah8", "pub": "6XRnIatC1KtI7DZlj8ISDxZvtsFeBOPKQETMRRYb45dR0kw6TDSb8UMXHHWhUBdbEBof5gvIJacZG4exGku4JsysQcc9AVR6Ydih7kaPNQgCiiKw9QACNCMWx2p171RVCpGSFoOwaejNGZeNJKS4jqulOWFQHGtbWhl64HZzlkZMxhqdA-EecEOLhzCkbCMMtXxb-cxUVkOxQpKkO5ofmEaKH7tjyNZyVsxqgUZFn6K8jOq9g6GCOEG4awGB6AZC72yNXLDBnVCy_7OMn2bAeos8AvhHkbsL0hsFFjsnWcG_IYvNPzUAcyGZlpsqjXJIh4AUxTi6iFeJFOE08nNM3KQEYlxkMAulVas2E4KU_TGeoEJeZjA5TPWVAQiPFFQ4nNRh1kotf4OHtHQVpaMzAypItIXAU8LI_gl4rdFKTfYu18MKnygjEnO9Z7e2cYwj_hqx-AQdA6ulQBcNR4DFSCOTLnMB22GMXGVOMDCmiaxZvchp9iEKNJG4TkZQmoKwR9pbEbahmsm1WvUbR6kEqNYOE0MMsRWNM3RBNltm0Iqo8RKMlpRq5RceWRRdjRkKdChyhuJ2ebBI05iRsuE6AwWEbCV6dQqNZ0gqdeU5imECjFWLNqYvs0BaxDgmoSdg4rFlq3UrZ3gLD4UTT4kM97HO5iedxoox__octTEEImMTf8uJI2M0nKTIpbWBHlofTfulcqVXjFYpr9GvuKM_mElaoJwn3MQYrFNLcwY-fzy9fqvGFtF-62fHcpcL7SVUu9KW7igiAHQfwXmCnMQzsxwLowVk8mFjDYgV2iIoNIeuwZdc8-I0A1CLiqOQNwCLObgSMVeo-WUvzmocsFOUtSUS1chNNwpjMCGKuHxOYOcvKLxH7mvPp6czIovPsqQUZdloA5Wqt8U1sDRZfrhRlUi4IVoTmevBpaEYK_Jze3cIMOkRKdO5Y1tB4TIcAHE8oNUarUEYx1YDUinIolRBBDyBAmR7rbV4iGenGHwgeTIZ0cpppFEDbkAX4AaG4YKGdGWrgWhhiDoPX2mda_BLOSilnlhmM2BhqGZBkKK2E1B5fgER-_AMYeVl9HEoKCFHm6KApgnLVnYMQjEv7kC6tsqxs-pOcnSs2EpGKMMk4gdIlcFNxsVU6sXINHADvNmtNyQgjRFKhmNPtYchXHWz_tgccWNkm1DD6qMATOoZcscAu8BBpKUwUIkIUICwKpay5KUsFjKpC9HPqSONVMVu7GYysVC8UDTMetWoXlSiDetoiolwFGGpIscf1ic_rUhbD3pyxVI8DqCsdFg2NcSvIJRoJBO12KHKRIYnc8ObgCzJBULNZ1Rmc5tCbmcW_mmhg0OiA7EJjwi_eoY82_g0eiyAr0K4DmBy8yqWDZV45KfAnYQBQZvK8zlj0npGqVWusxzP1mw_Dbhnp-Z6SyIrHNI9unG7DbeDhcnBD2QBp2t6cNgvUoCLzPReQPYy_bwVEwcrPSO4SjUG8mhuybiU5NWdgIRD95gD1ApNRoZeJIhfP7yM1vt1ZCxfV0xEvUSb25DOebimyplEvv7nxam2hbnlRQme00B5wPt9pETxPSQE4ZUd6u60U9e6F3C-Fqjwfg_xYMk3oOcZQ-P5NrsNxK3ho7xmtpSKVahpf_2P_o2Vz8YFc7t2S7jAx9bRLQQpbA", "priv": "c1il1CJwUdajeAm8PMZMq4mw2PH9Z2vThLkHU2MQ10A" } Figure 1: HPKE-8 Private JWK { "protected": "eyJhbGciOiJIUEtFLTgiLCJraWQiOiJEbU9XUWktVndyalpXak82bVFRV2R2M0NKX3Y5a19QSDN2UzdTMHhvYWg4In0", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "encrypted_key": "zn5k3HEI3RkdpXGGdYM2Jh-dKMjpaOIOdV0ktJYiT_4ZF7hoHGIxdvtRi1qFccO0Syy0nGCqquwQXTiGvVXV8-xM51oP5ihdfMezPX_vBMpaiG-9e9uWKnH9iS1YeXXKNwTXqRTlT4Y0gVmcQ3PC0-JiG3tFfxWUd_njQMJz9RBLS6XxFxh2huK_z8DdEgBJiE00XOwfmtzradLowkaOrHDMjLmkDfj4izxI1NplLAGl6k2-iw1GVBP3GOZH5oDxwdo9pzGccHxifsnF3mT5Rpsr7hOVn-JQuWRVB7ym-DeIJhHdtttknxfh_n6C1oKRgC9wD6kXu3N1yI7Xrya-ZTt-iL8qyDFvj-s84V6qPWTVWzX1hhq71isintPZjvp1wB3UQRhqQLd1Wmg8S41-FYcogbR2GUdzH6utB2bZK-wz3k0jL5pBsk_waA08h6wyzfRoU5BQRhWb9umI61mF4FOhW6UoNX6NsNzdi8Giqwskb_uv_yNG1Tvdv1Ima0f8A9uw2RIjLs1L0mVa7JHhawhT6vgLixkNqfQ-n7QeADWygm9M7Yw3wKV4GSeNy4daLK8k-DWwoxkURfKrcbU5azN38bcDuDlLXpwn6faiVzMNmyu6No3b_jp4tdfOd5VZKzRyNWWHSD84Z58GQEnS1UaBgaIP1_VSgY1__Bf7PWCv0qVgYKgLaDv_TiOhC4n-wRj6tKgbWnzcjx6R9pSHYvtP-9lE1cc7__Rceuw07HZzeUs2vsTVmwFThVJ7jJDo4ixW5Ceh-WevI0CYO3KcPGS91maeQmJglwIRbzjZ7GdBLklxAEMVDM5fDUqPssInVScOSTueAXaieOwhIelszsCsYK1bst-hgdHdNmJyYPjRFkXnagb8oftbOaePibhV2zi7o6f4XMn_4UHnS1rvo8xVUoN9s0vbPBkFxzgifn_cf-kQlXzj-iZZ56IJRcs5v8qZyDFjjOzzjX86ST22Mn4ZcDeySRMOPIglvNrCIxDNj4YCoGvU-FzrzsHhm3euR0b7-fwvM7A0xD3i-GvlfDlZtolHRMSit2XSdtsBZeVN4P4KIeeZ58OdliTwKjSp8cXC2OUe-_q6K9hccfwcg4xYY9nEw2iPVp6rqDF0EgWlGimVIhPlvKsV7evROs9aVmTeLni-u6fgt0KOjaGeHmGS8beEPUwHCclUk2SisJZvCyOPswoT00HJGqc6EVYNGt9_gK5qKHuM32MEmEls2ZHMg7kvruTEuHkSahtqrMykrV_77q0xgbJbMHemc4u0rpK8Qgg3TloxHWnBHxZAKhQwb7TYg2_crEj3rY2ninenA4iO6Yv0Rhu_UmI9NANvRWPzJREhVFS7RMwscG2Ep46ezHWO2b2QtzyBIaUF6rvdeTSzPwmrUX_qNr-ZQMkuwhBoAqt_nK4KY6du6yPBF1mbP3RhZoOoB1R-yHLoLxIEM0b5aSInfikgqDpAg7YC9bXGbO49jdXjFoovtNtHUciDHufC_oNizbAFSM67xrDKwHdp0VK0zPiptJrz39bC8Q", "ciphertext": "F1VkyLk154-wLPTIPKKZWBlbhot9YyF-_kHyXnRTsr53qgJwE4SqSmz0GdhFOTch0budMwlZuLCoqjBa2FEnjGdPCbCsKC5MVlRUvFUBxDS3FI8NBF_R3Cj87Xia-luFwrSV8brW3p6IDobEmJVGKhHWax7gKZMc-nvUkfG88qcUwGH2ltGQUfrjoNP2tMYdtxdwhyvtx7qCoDJnv176Vp-ySAgjnzSZhGSe9_SPooqtSX86fuauADVauOVVTHYJlzUv8Pb0bBgrA2PKhuEd9YvCTHTkCTrczJFmQJit_KQ2k50e4qo88KuIMVdYHeAPzyLwyRCYyq_2o5F5SjxlvCqsJ-XixQog5EumMz8zVSnUmvAQzCgGiolNOKro8_Dypg" } Figure 2: HPKE-8 Flattened JWE JSON Serialization eyJhbGciOiJIUEtFLTgiLCJraWQiOiJEbU9XUWktVndyalpXak82bVFRV2R2M0NKX3Y5a19QSDN2UzdTMHhvYWg4In0.dfD8NhCXNZzcHEudD-fYyOnARkPpCU85i9xWYK8FCQlxF38Cvzxi7vf5lv2zicOhiJPBtapFfajU4QSVQ-xpN47BG8IKdroWUVGg964RgmxYHjetCi-DlbmeFCVaPlLieycvxuEdWmmUaL2g6lWmc8bqSo27tatK8ZLxqZKBrGGAXGVpdtP1MgjxKYpd12o-e7Lu_tjmYA6z-ws8LvR6StoNZD5oOmuAUwJvlISQ_LIz5y0A1uETSaKRyvyHORFRr7PiNRA_kSv8zGsUQFKdKCVXiVawylU20YSbBmw5tUeiOEfOp7McsHByWlVos75k2oQzd_HB6ymPaCp2Yo8CpaWyklb7YBup15Csy1bEgawr2pGdohxPMTsa3SmHOF8a4hYVqUjxK-8V-2Tshm9ZdibmhYqtqDuYW2EnRVTWKTrIXr7YBF5WTaxAXhMg-8txtcMEYA7kJwBSSU39uMvBZE1wS1N-rYwCUaVecjWeXRWNmpO-HsxIliUy5cRbpWCKUhTymGHxJOX5jUsCPzDWQvDXRBLDT_-JsgSgO8UZXic8HajfhBTxj-zdi6vT6v-uYi9wAvHlp7yL-rBlKLGvI8jdGj0Y4krfYtaeaKa2ZI3lOLk6IUZGKqn5x1NrZxZzTKbTI47_AZyQcTnuKgcHk7Oku_Nf26nBumWqqz4y4gRVZRPRi0Z0eNsld19sYonzlHWJM2oYu6vmThmW8uyzXjZr0ABjAL1X9pLxU2IMsgjhID3pauc8J4MazDd1uLuzygBAb1ztDDX3J2YtBGmONxzieP1G4IAZVAtQcPCuMxk_RWhGK1j9l-nQMgjP0DKSBxVGLutrf9zOA-Myvf8lAGZQGv2QQKymc-R1Gq4uobZGHA92u-8hm3hAVbFunA8pnQWWJVkRiGckO7ssS-d6mfmgNKoyp8khnprai8g30vFRIoVgijxWCXdkkSDsM-aEEkDfhde1vZxNQpbB9qld6VjJfVVlpfEkjbjE_RN9sjMGqInAlsxBVFcJQBMTNb1N_3YVuB7l_TKBt9fSdURg13jH8wP0jKybWqyUNIQYbav9JVT_o-GfJJKw-CtnXNyqDz0INKFfJHT8psTn6CZhsjGVtdR7sLM-ZYblnc6QQwey-mAf5Et7-DDlrRPTPv7yoB6o6J6cJwtuyhhu-HFxCmRZIpSYMRe8lIRrPUXk3MRmcQWmZf5emPEbEPsEAL0UeT9XFrHFqeIZvGgzpmbJgJn5BSUarqCcXWX6uAcAdat1nabT7nAHYPXNnxG6-CCwSjwvrvVSdNmSJq2fkwOjo6F1kz3smAUcUhjW7W7iC443oDgY3X_uYbhYSZUXB0XtqCuWSo8ImoeMxfddgxvdwmfFaHiNlqvSVCkewAcL9Mje1lyagnGtLCqO9lJ2uivnJCyNlPB9A7aDqpGt9DG1UnmHNHkaj7bqKFD265HJufoEmNG2eP9YnzRTEVkbYSzmvGH_pKXqmTv8HhSSTvWvrpKNSxLwbp-IAKtyexCuyjcg4AnQRIqvyh6sMM2qU8ERhA..I440XaEekuepH9Bw77viw84dJoqNozKkTAXuWGcuc0MeTfHXuEnixKkMljPX8DqM0hLIx7fq_bsM_A-HA3i3erkcMHPL7GKo7Tvgaa3GvHr6Iq6mb0iED4k4_TudWz8dW9762L2jinjdK-aTy19T2bDUr8Em2Wl8evBRtWaRbZi-LZrM0cuocqHep2A_ghhUVSv-sWrLuYmwvW3tXLGGtqpHnUleG0rYOJozw8Z0Ovs4tf9wPvr-sOg5g99XuoUKtlADhJEy2GtX7BYFC5XHICt6zcKipt1X9xEDsRh-EgSIcYg1oaXpFzsO-CSfzfSPVhwU5bZIKdAF3rpAjNr4gMPsAPY2IKviVQoioDCf_1xyWHoGw7P3EbX8_LmzufHUoA. Figure 3: HPKE-8 JWE Compact Serialization A.2. HPKE-8-KE { "kty": "AKP", "alg": "HPKE-8-KE", "kid": "clBPky-tElQGRa8AQ1MYfMPvfqmhOs_5lIejOuqAdps", "pub": "pxQRXrRJLke8BMBXa1FT74gM9fq71fEwRPRndVsmsYAMU6llEnJaeKAagjxk44yl9Psn7YBn3tVXXLVrqIxyWhGsP2pmH4Y2eogBaRMGBfQy-TM_RzdFE-hKLHqHPmqP_PZES2s6O9tBkvk7D6fKZKiBDSKrvWgrKCIo1DccgfHEayxCtex1w1ZjVweIZWtVA3V_JdijzobGiSU0dzqyjVBBCQVcWiSFLLuX6rFtiPpsa3SlavpKHaRTIZx_5ocCO1LBAKq4jwew4jxnhRujX4VcaOE2MQQ3FUmT6UgMpWSfymJNBOqwN3uU3EO_ktgMPwdfrRVihSgirkiV7BhSW9uN95OTigiJIiedxPV6asK27cCcPhN0lJQOynlah8BjySYKwdMRHyxVVhGDmnJ36veTEDoboBhq5iAkcqwed7O-KwC09XcVciegq-tYI2NWMOkBdXE_W2qvvPIkJpOYtKAztpUcxhBBPitRGQcdz-wD4nik2DFk82sfDNpC_lV_XWYR3KVwiBix2tCB3tw-j9loE3AaxGefsyl0PPQsFGu2i5qutBlUclRUhMUkiGcyEnx5S0xNYzyuM-lAa3WpNzlEc_SoqmKvobZp0pi-ExYnpIQJ7nPJFNXJ9ig3kvpNCxnKlEwsP5w91SbOcLOBQ5dIq-moh4kK9ZCry_JkAmmAxhu9kGCughacCPaUqgZrigO9bQHHw0giX2EB5hA-r6VxzMwYJcox9SxD0tJVsAMhCUGhGuS5wodrPhay-ss78AMZiXm3D3mDe-sA0VVRLaN3HgmZw-kud8su7bKh9zYec4iHaygQq2ySGoeOKoGesVK77fiLlWaYLNtqEmywBblQlkZbOIUmcVmsTwd1yZG-rPIka_eJ9gAE4Te4XgExooaJI4LAdaif1stG-lEZF8RmNlmvm4wdAMZQAqPPLiOwkVAhshMUfavMeViGedgk57y3JNpgqQuX-sEI5NmNMFW47wR3AesCpuuq_Skqj8EdeWWaIwh-L8iDYCc7N-tLhNwgJOpnI2pH-CpgVShigKi6brIjB4QEV-JtRzKFZ_ZF0wM9GYTNsBM7dXlxPUUVjLCyWFWYScRdwHypH_deyvaEjny-0DgpOuR5pxBWtFGEsoAQJBmPZFumwYB5dZkyBRJrQPUENMNw0eZ_1yql1oFIdTQCQgEln9BFfCPB6MCX8kZknPovhJmq74BALPWaINeZhniI48FGf8tz8VdJ11Mu7qxrNiUHNApTMcke3Aw2qKl-NtFeR8Ou6fqQH0d2ShV-GvCcuxjKfUdNU1y5zYhlu6ZZwvkZ39jKl-t7Eyw6rAEnUfWA2hEXXMaDqBVRYvqwhiM0nboODhWUJUW8OEpBp9eI3eel7tRFViiZQ7KsZmUBVyVfGJQvh7DM51VAvUUSi_xPQzsz--yWJ3DFmYWF6eMQk7FdUXu7HmFxMfuNNGHMypx8S9RqfCiI9OfOeqwVSaa2MAd-b2cgDAo8qVeCGcMVU9FRwrUscVeltcJI42sZiaoXFPUlyAKncyajZ6gZhFNexIDWiSCp4L54nM948L-KcoFnZwHsueAjiJwE9dcy6kUtyQ6v0_OxWb8OuM04u96GtOld8wVIcB7QE2fd7g9XTCdShgpdmMgNnGKrJM0A2Rbtmnn-gdxGbyArJA", "priv": "biUK5NqJzXzWEAN0F2zzkrEr9Rp_QX55is_j7VYuHCQ" } Figure 4: HPKE-8-KE Private JWK Skokan & Campbell Expires 12 August 2026 [Page 16] Internet-Draft JOSE HPKE PQ February 2026 { "protected": "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", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "iv": "0aukXUnpQczTtS5n", "ciphertext": "lbv67n97TIcLw6LArd7QspB-pE5HLGM42rk89Lsp5G8t8CS57V9StRYiRAJekaf4wOSNoYk8AYGsazhkQtyXIqDk3tmrOjffkR06NB8rD1L-i3XFnlP1oiF31qCiKeChvLuQE_KXUTAI84MHxQj4082y-l3y0BrE4J9lkz6LrxbUs-i9q6mfqU4Gp3pmr08OI5eOtXZgGUSZWaKbpL9hd6G8s1TOrCG_HN_I41Z24m-r_O4KvH3DOEXdPOQqTHHAwistJM6acBhwkq3GA2thKpIRxVcB9LJCglEiNPud_pxG4dbIYFHSLJkeDsAeuUsFFhWuVFvttbQinngUnW4yIjSVmxCXEvLiQX3wcWBgSMQe", "tag": "a0gDQpq6LklNWWPGgpXHmA", "encrypted_key": "RoY6etXCUcUlPSVvM56k3dkyqgKVsyu808d0z8R0fnyXM0PpegK-JIjZLub_8NK6" } Figure 5: HPKE-8-KE Flattened JWE JSON Serialization 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.wrUWvWJcDAucAZmzM9DFJ0nnzpqbg1RbkXH2YdRH71s18RtgNsAI8HoEL5Tl4FZC.5Pe6qU0dQKkv_-vH.cHWwkbsSVMRMfugjYotDWfkQ5cweOEtqkCGSBqVirv43YyNkw07MXu42at2g1O16L_Dk-8jiekCV1fH2Iqj1FvI_x8b63nw5UGH0baXMFngzdTHH1xWleIZJa68oXeSZSBPMNREqvpG3qUuHEPa7PP7JLBGK7HqVu8B7-uFo-NOzHqxzLWrjy_XDEPicYcbrrKKHuYkntKJqU_iLHUGQgHzXMRLX2hZEawHAdOi7O--19jFkuYBktgs-cggvSkFgtOesIs4C90pLiQ31bVx91PbsyWSc3Xb7M4DYQayWqL5Qaw-gZtGSJaOIBCQXexvK14sPSkccue2Czi1BDMDPv47GyuBSBSubSJxPGoPHvbd1.XSzi1NNTvTIEN5fkULexvg Figure 6: HPKE-8-KE JWE Compact Serialization A.3. HPKE-9 { "kty": "AKP", "alg": "HPKE-9", "kid": "eb7WHB9a-KjAiddCtfLZx0_Y0LmShdR_ogy2FPlsd9E", "pub": "dovE-nonYvV3JQQ9Q3eSbtIvjjBAY2ivhZlHdEoNxIsawjsrJWG-v6VW4uGeZVcmB4EHe_ePHctfr3xDrlt4VOgYjYyOCGVgm6syKQLF4qwVzoJCBkCI3LJxK4hYVzHJ6oekQ-uijuEeJ6un6iEKSzWJ6tMyltG5h8WlWWmQnPgkt8FHz5ohoKpfhEKsLgRrNpjBcMhPNbOF60K5wPRL-VhQjbxlQQtomeQCAAGLQwKL8lEF1umjwLe7MdlSwsZ9ixOcHwxuNRKwJ2a7zwWG68C4V4TLVSiKC7I5gRC6mZY1gjFUcoCFAdg1sdkZUviLMlwizIoTpzIITZSo5upD9QBrMsTDIEo19GWSACIsZhK2rgEoekZ-4UZcd3qazsZgMSY57CZqqfhXgEBqv6a9mntvLRVXM0Ro12B_wtdJvNZl-fFSBTMkLoRPQeXKB_Vo6mYul1CRKEm37hpMJagk-aZFEMlYSSVoYMmPyEMExyY9xkMCvcESntxljcAHqtyO94w-Wjq33vOgvDFkv6yu-cKlg-m4NeSNcaQAQpQE78DGTdUovEhNOJdB9TCghNUfBtUMVLiwlKaoEBE2aGovjua1sjcPR5G7ADVo6POcwlKujUZBBBpqJiefHgg2BEe9z0E0CTyWprsAnUeMrAihblMK2UJ2xxKIQgF1sXNEPRUJu7Nh4roZ6zxSaDM71fJfyTNSL9lEZAOxMpcv64iWwmXDzuwHy-C6P7IlhZRRhQaa4htsOjpQ9mymL4UAsii21MHI6kOD0imFqWeceNcdRPhnTJcdW4NUnOuPTRi6yZB5RdFqBosTTGZrP6sMs0ANCUdimtWo5sayTEMJdXSPLmYrV8q2NuZmk2WAxBszxGUfCXxWGTRME7laBNkyY4yyWcAOnCavJIObfYC35zSIDRgYxjoZIoyUiEYDj1jBXqVRXBkbtPyU1FZMsxiynQFi0RoA9MZoFDRUqdNaJLOabYqKzCsjRicCsSoz8qSLNaeIeNRrslhGEaEOhvOzygBUbvcwtbyB8XUlZcYJnbUvrYZPwgbLbVqCnPgjfemvxOGXmIHKabB-fla82QAXSPDE4Siw-_UFfrMQPcNl49ethPC_WDS4BkrMZfsBFBGHVYURIyNKa-dwcpgTXnBSxXq0-vFk2qg1rsQRIOpk5URLySdDtcgpZckNuXMB4QZi3EM2I4UpKJVFJ-VmbridVuUyoIIaDhs1PGOCZxFX3bdCgXW7DrGg89HI4xW1e6oG6ETMDWJ79UGZFsDIY3NpKdOzPxZB25KC62ysoUQAAeW04hJoh1ufxiss4civNlQhXzOx5aOm6kVRjBsBF0YvEwioa3QND8pqQaGuPJmPSyk1_BHI7ScPBNfCiWlWjgO2zYh5rSEKO2sRJ3kkaCcle9FbpyMU-OdjccQ8g4KFYXdH4ZdDP3g8LBLP0YRnOwBz_PgcIPQbesiH6PuHK3XJcryso1U41OZVPtyyokFBiOt_wky9gxWbkqxvnvJz3xlbCrqbfKQqWbtROViI6DIksDa0raQbC9sIuc5ihVwkzjQci_PmQLrnryrezp0cRcCuXGQEhC58adU99n3Ix3tXYRIQ9MH_IuXXZaWhtzCtm4yDSFZ7r39u2q4DsVnMXRDFRPeumDvQIiKi_OVWXPZXiwnPVA", "priv": "LNSniTzUEi-OzELspR9-P9T9Bs9wSUEEO8Xv8keGJ5g" } Figure 7: HPKE-9 Private JWK { "protected": "eyJhbGciOiJIUEtFLTkiLCJraWQiOiJlYjdXSEI5YS1LakFpZGRDdGZMWngwX1kwTG1TaGRSX29neTJGUGxzZDlFIn0", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "encrypted_key": "4DHXgJP8raAFh9EiAZ6Hdd7sfGTjuRGq_bcY0ET5N7BGalXDbqUP0rPVFX3deVdrVUC6JqZ-Q9vZc_KAxaxI2t2mlmwKWwUZHX-9sd83VgnGg7exhgLUSSwp5O-FyEKgBAfrYD-DtknEnCO8IREPJj9JqIYREieUKzjHdyergncqHcb3zngZvJW3QsPpTriFelzL_9peB_PhPQonqzaBxCSE2pNq-VPjL-vsVzdBccEUezHiJ1PI0hGmAdrBh6YChO_VpHVyhytz_5oDeHwD1KJqiuVLXgLQaXHv4E4kJX-lr_GnoWLwGWSjvMftraxYTWnZ0OtH7IaD59UQmVRoI2zpNEl0v3y9BAtwVE8PdoUhr5dhJSSc3lxGXekvuU3LT0r6J_KCvqooP5Yr3TBbIRFB0cTH80zR9ASYtb_PVoEILt2dZu4jiPEi-YVJQJ9KH_zL4THFbm0IUnhwiEOjq3RfsSXdkNER0DaoT11WoxvB8s631EhpiBwjobmtxb3a5JQRKog-hpBHFQnhcS6bgvl8D5arJxRiHPdowVEW3PFWSGTWvExfegh43h1tlmosFc3U8vHRBMQ4zjQ2xnL8QGpFQ55b6aUqSD2KU4WEDf2oLqXJwbA_JEGAW9y0Dbwm7jvN-0BVhk-ngvK5c59kmkGRWzMIlS5YXIPCxQ_uo8Q0wavp6R4C7NNJH6qow-JMFlJ4eW4JA1eL_rkEIZAFhn4z9ll7y69gIS5c-uwvzI14aYdXhDOvhhozsMMNnywTpmG99CIcciuVP4uSsceYoIhjfbH5RVJHvtsLcWj39Ht1MyM_ORHftcHqCPN4ukGOk0s1o1t4MmQrfUt0mS8exA8WjKKVJ9zsnMs8kqmtA6p0TBydh5QKDZ0CQdcxAS1JlLwWfcYa8VNJ7vtQZxOuUUJFeQ_Tw_qlj8rnwmVF0eVVgBLGuNqRT191FWcZT6POYkyWa7gZ5oLpEv2xFmZvi3KDfOQDLMSWizFJUnCyNsZmnemTjQ0CbQsf5piwVcHDrWnPyjTuw6S2mpQA2NgMoJqzYjt3opMpYVDDKYD47HEq5Wt82LTcZ3FXuqxL-kfzUH_XnH10sNnTIfWtexdqySDwvvp6n9lEN4p_uzlwoibuLn55zyrAxXirhRHHFb7vByaGzX2BFtdjXIxI-NE8XJCZFBy9KysXhoAInk46LCJ1H6WUzJjeq9a2rKsHYPiu15FfX_EADQTS6y-ewKQo-cJE8xGbZpi152oRKUvIUMgoaWCDHnTNfVOcARHkMoPoBwSWMoJ6DVUknIITLYP4bZXN8sFS1CBGq3M40FWAVwTkPMbRa8rZKJEWKcfuV2g04tp180yaXK6EJO1RWTwfnSlB1DCEWEJecO3IHUBIy5i8G0Fsr2XLQFLHBVgjX0gpdi6suA0vU17m64lic-Rijn0Bd8h1Gpf3GeQzCFoUZgwEeA6m-NJO8sGYqgtJx1B2OwBn1odRBAdXa3-f4vP-96rtM9TsRVU0qj6YDoVQ6SmXV3TCqbKGRerxOc-hujo66w", "ciphertext": "SM5aJqXd-wXt8OwqJtfBHxhKj1zbZQ4X8RGFv6LOuqxXrETo1hEAuOSDmYuv_QzSXN6YUfQj6rQ9C9Q2o2-9-QfWTU0g--EV9fZ-RhUlEWkHeOOWEBQXiPHQ-qBbwyuMRs_wKma-NYYfnEmby7mnpEKb1QTjmQ_sEJZ4fVDyP1AlJrH9VcVgMvkcQI5Dj9HHNAUjQCXc6K9KK86eWo62FRC8J62_c9IP9MDf5dvpbHf_RHZmHusV8cqgwgKCU84lVpacruiiBdvAS1YDpR6fVrcXY55E--zSL0Yg0wCLIQVSFBESrdFdpBO9Gn7mCVLgu1biJmMNcX2tpFdkb3jOAqpIMoVZrBrHsb3Xam2TNqV9EW04s9pCortCBKfQEeFtLw" } Figure 8: HPKE-9 Flattened JWE JSON Serialization eyJhbGciOiJIUEtFLTkiLCJraWQiOiJlYjdXSEI5YS1LakFpZGRDdGZMWngwX1kwTG1TaGRSX29neTJGUGxzZDlFIn0.YixiKg5xesnjE6mnMa3ijN9qVtFF0edAZUpJjibK6VGD7pmsmqsHPrAtvdyVCP6qx5nmk7WC4RT1RcHvHZ25wfqkLFSaK8y1zp4n0mLBnd71rv5X1064_8kzoLFgcQr9uJHkV4PHbI8hBp8hxydgAf2uDw4BCj8M16PzW2pTPg9KQkmRUDfyB_PopArYr0DtXgecstqypcfC-UuIRWK-17bVUCvMRME4kzcc_u3EO_MrT3uCZDYdPzQsvXDCnT9GP4ReX-BF_wzSH_oxSC2lvcB7ykCXO64i0jROIsKMIT5qa-D8BUCXBeEdZ9KUf1sQnKPyrzooLmwKblwt7MU4_KGPWug_tETJUlNze6NRqSsAPTv8ySUQfhWmQxrwupI1vuI8ZK2kO35g9lfCxQ5XREmvlKQHBWpB82cCb5HQvGlKHi9LVnQEiuP9-31bZrr7EKwSu9LC7BiVeXMGkyVtPhad_q1VS6N3NF8gjsvyl56U34ze4dpqDQdb-rWMev9AQZAF4gTEBh_kx0rnqxG5otBlH_7zJpqUpeBNKVdZLpnfE9Yqo44qKcQxqgMxAYCCKET3Lb_rr_gJZeQ5Uef2qggTQmGv2zDvyxjJVK1g2joTxnlIbXW6pev2jVCvg3S0HrPdbdtL5vK2oL5_18_PxKF-39jAJdrX0AC130lj1dInHB76WQuCWHbt8gAcF4CzELWe4lTRlV0Ft3afXnntUSr_JLJn67QzDTwnfEI3Kj1q05ttGETSiaOkOiQ4TujC9koDebM9y1jrnr-pvrLjmX75zC79KrbLvigg0AzihmbnFdR58IQSZ3Uxja7lxjVOUe1QOOs0xk8_Mn1rgu9w8SJHfcbncl6uufEb0odf2emPyRoZZ5ONpIqtd2pLeDiOFvFeieM7qeA23yDFOmomJ77teVmuKG-tY4QCi15P9bHEVIbICryTRIKofklOS97CgzoWGqSbvzeVb4SdY0qs-Gtk591YmqZsHlpz0ITF7yi0taLI47Mrfe1hNz2-lEZ9iQWOsCi1xixOnkQaAexP8HLbJkC_dnxKI057unWoFgJ6poMtBem0663VgEafx7E741e7aiWz73B4585256pthNoUD1NatoIJS93pgsGodHFDgTMuGLbmF2FRjvx2jNnywSxxTr4XMxkaAJyJiUFYPTXh9sSRBYfn5QfqKzKqjBjjFqdmVrqAzBzUAkGbjAKYL2ao_zUbVI3sKoeB2uGc8Svf4TUqJqGcyLSA0gS7UTFMicOqkO0Sour7SiOkYb9s6i-2S99AFN7JwpI2UWe9Xy96_sBC9YdIhOS3RhIOPQ-lw6ULUFMCwjLNyk4dV0-9YvaE3DCoh3PQC8xqG6-JKNgLaQXaaw5YBCV3F_La2IXrDAbw1kIsHz-7D68YO-Cxl8r4Vg58imG0iWC7hB63cDuML3HtmXsJWev-W1UfYZIEMzXf4aaKpP24OV_XM_eFj4nqG9GUr563HNATC_xpIR5yAAyLPXBoWhqIDuk4k8CHlEk_qMwLE8KwLur6e9KxdA..qJ18Vn7_NeIcXfUx8ghZFY9cTCOR04Fr0JfY4-tQym0Jyc62ywkQDwu8HeaLowk_1WChzVQmO_BR75cHZVW-wooVYVDwdZykKw6f10yK-ubk_G541JinHeXx2yDEYW__TnXMpLH4a9PMFJWgrwGMoK_z6LSNW2ZTlaQf2sYVnBYPX4ygdhUsGiLgJfvPP48ZuH-QR3vk-dQY35uFgKIyXJgxUE9KQJjOcWjqZM0-1sup3OKBQMl7jBPRhmp_Xljcg50lr_Y7VXcttlduMh2h9HLfZlzFmFoBPzwJqaDgKusd4SBT2kCfp3kMS67C7FS_SxIVBtEMvCQunsR7f8ci7dV5l92lwwKArKZ1aPMgnTbieHg45De4DvF5P6OfJXuW7w. Figure 9: HPKE-9 JWE Compact Serialization A.4. HPKE-9-KE Skokan & Campbell Expires 12 August 2026 [Page 17] Internet-Draft JOSE HPKE PQ February 2026 { "kty": "AKP", "alg": "HPKE-9-KE", "kid": "-V9VDorHU5_DOFXFxSSNoQvhWMat3LtsFnzd3BSObnk", "pub": "_VGNHTKXEdAnfXdDRfOCcEQtrdphLmbIcKp2oBZbVvCU6ptwNgJVBiodmypvByrDHShkqYkng6CD2YUHdBMdYGvFKNwNS7V5fnI3fYpVvemlaanFmAN_7eEbhzSuf_B-J_k7ahilfdMBO2BUEcpkmhRWr5gVkveyv3uksoJIAbMy4CkEgEFuEBsLOlHLMyxxmCau4GBa6uWqPBkCVygnoBCBNChquUymfDQoA5MEBwuMiruyl8Jp2QmsUHgqMSd34Pm0I2dhEYsXwUihaqUhPqbPRSfA8oNNpwc0p7MwRmx2M0iOXZU9ClU2iqNSYHEHXkZ6iAm3R8R68BlXL4BHJnglpSiHi4YQovuUGeOBCotesMU_ALXKP_NZ5Vm88dhSLfernRjD53UPSUvL8hvLgcKM7KJmhmUrlUQOcDjBlSpsYpNwaJVCunSW_aI47Dlyr9CPGWCX2nsHkyag38dq1nQuFolJIkogDHmQakZ5E8BYA-liO6kYyyi62llUa7sAN7osTIA_svhkW7LH_tyOqKbFsDGB3XmHY0VxzsNo3bQeKFQ7DwVxBXk2KSJq-EMzKgsVLgq7cDdlneQQt8LCzYk8J0VD0FlMZmu6J2UnZaCk4naY8YS0DcLK3wcgThGW-rZIwwpKXJrMkdGAn0cQyEi5JDJX5UOI_to4dgdWXWeA0pudbrVZzXZeuBmIPPgiDbVsUONdcDS8wijNjSQ5tIPJtPp9nHl4erY5feh7J_imp7a1HVFyLwyyeDUwoyN6RXZowlMWVFCvmaUNF_tc4rg2eJaugOhuVxEiWRygJjoow5ynQIcrHJrPVEdJvNkRumpJYIZ-oCSGRtBwbRE38ylM6vckFHtbLNW8nbmWDsyhe7KznhoTE4V1znlvs1pzWNWut0ElsOuoACnDg7OvcoMxp7pMK7KxLNpn-HOKMvswUMXJ03fJDUc34jtoIVfGt7yALYAW_gNg-MypzDtEJ0C6ezdPvdEcbEdyfFksVjAjL5MJorYLSvx1uAFlMSors0Zi-oWSn2as3iAP7QclUAJBoGsVU1lyGFsHxiKQnSw0VhhMy5pM4dVBKuunLBpe77mAW0AEgomO-BCJWIaZmByeiRaU-WQ8rDO21Zh15jksGPVMI3CGl0IJBWZjnNJJwzPA4Dhk8yXLZORlG8nGxCxaDVWTBtFlRMsB0aMwC6LJ66lkevZCPise0Ld4CtDEhKkWPRipHckb1bg7zUZnQDwO4wx3kRNzPbqbG5DGjwCl55ZC_7EECKOIqzWNqBmcS0tMHxJ2TXl_NPybc1AxQYeixyd8NOsQtwCwcKjPAbw5FMK86PwprFEzpqwi83taWhV1u3puLTdPW1BuhpN_XHQEg-KeOzuu1URVngllB1ge9otW3JNupUCjBXWislV8gfqzBUcPJ4SSfgy7goJF0tRUSEcdNhNagSRbo-sxtmU9oRwka_LB6nh9o1WldYwM4UWs4fIl64GDw3l4WXdAM7A7-rC6TIfKM7BmC6OH6Sp_SiBSTftRYtIUQboSl9eFnIjpJ-y3Ki0cd1O--A5qjebaWE2MKc0q7oNaaLuWsowEMugnHM1bm6KEdXJJeWa7TAC3a78t488s5-VCvW09vWbER_SfjU2Ch_nxrtt6nnHlNmIZoJMeZQzbIQnO-glZzw", "priv": "65u2v_r9I_dK7QCtjTBmMhQjytdcc6kAqNRSbyCGj5Y" } Figure 10: HPKE-9-KE Private JWK { "protected": "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", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "iv": "XYg8K00xhq2EnFx2", "ciphertext": "vvQX6OAD5uuiyTmzu2ZXoPBRF86Se4Yw4hDVp9lDfIO_rFxce_tR2UHc2yeLFxHgg0JQs7DbB2ahWrmqFQa4Faowvd4vy1FbDQophz8WDHaHq7h43hjv8h3yZJDQtVIbRQvqMPsUivoJ6J6W02r3bBtEjMflMvxwBuZNs1uMbomx3YN9D6y6Ze8VigP78Uv1Xy4K6R_wd6PVW8AJaPfTBV1sMWbCS2enqNtQms8qfDk_7sUhQyZvawPRxmlQE8FbSDoXfh7bA9UfBcoKKB-ni02MlTRs1DVWT0JttYEreqpx3cccIBTJ2gOSy-k9ZepJipmW2-tPPok759Sc6LqrxJgqJ9rRhNIWIKRnPkLElSNp", "tag": "rZzBJn-V7ZmPUOYBhPR0wQ", "encrypted_key": "8doxqTRQHU33CXcWOtIr2b7xKX_xA0-WYbRbtxlHcVsX6-LlV0InnWJkwjInsymv" } Figure 11: HPKE-9-KE Flattened JWE JSON Serialization 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.jfm7zFDOXJ4AZ0rXCJqFGZWfrMcZr-MjgiM8b3Domnl-_wRnCdj06K8QoVBteE1y.Zla_65DmP-jTbGfV.MhIsLHQU9365GD_dX_oIqQpdi6ES14T0FDUEThCrM6hGaa9vjdLHZ9TqX6Bh9eOaqwlwpqzD4FArTJnA9omKm-qnS74c6--ZThkTbI2eLQ1KM47G_0rU3BY2bebARwDvGEihxoAgzoLaHFB0RcHDg2b1Q_jSTNzZHSMfcedZ6Tmg45aJnZ8CT5VkRUDIegaLODcC3YlybloLz0jAuwR8lYLG-_HZPIWRsGvUaP1NMm_UKw_htNajAh4c_nSkcO6oyfuy7a9xphy6AY5lj6LIPNHUolwtVlDuKkXiy4OFn4aNnJrhtLJtjYhrQiOWGl-7CxwffIr_G1L669V1li27qpuo84wzWdvYmuuxEWZmaIKP.jRIy4Dxq-zZ3w2ooEmPHpQ Figure 12: HPKE-9-KE JWE Compact Serialization A.5. HPKE-10 { "kty": "AKP", "alg": "HPKE-10", "kid": "a6S3CFflyR--3T_COOiiWl-QogGvjJdBHlYjUvSgY_U", "pub": "xklAICae0qgkKfVvsRSeBudZynYNfEZpzrkcuncC-6JezFhrj2sfxxECQKy6DtFIgdEEpKqdWsa1dTaqdhGfZhoUL4wO8RN5GAJhUUFJcVgmxTaDUWi96ZwOPICAIfgUphuy1hxxWESiw1uSjPkcd3tjeDOdONMC3dAg8sR1cWxrv4OKRKipQHqAJdxnT3NxF2AYShYT2tmy6SBKoKBkewWyE2R7CughGVG3KjEau8S-EJIWRcxMxsim92AJMLhgYXOPZTrLgrAPrnFrggIgKAnD3HpgJZtUriOcf0p3m6N_g6NdyRKuoTDIKkjDvNQE1_dVf2Qa98Fy41m-E9Zi7Em7tlIwMuKpKJt8MJbGZ8BhtoQ0UkiLc2FSwdJeNosem2kJfet4LdxXBjpgkNvNtBa_39ACiIq5DHI9E9iaKrwIFAGq27sOjNKM6mSNTxpzxrs25lOupXV8oDkTP9qOd_ObuvYoWyGqYkWFeQkrDqMnI-YYvrm6gNOdgaA2L8wSeZLLkSG0z5U__lWHJXW-tttSjyczVQpEsqcHzsgIYIqod3yzpdlekqo-9aanlkCOt8WSH7jBCvcQ1zrJOEss2LzOKUeX0zG7tTgGf1hrMaweTrlAZYtDoiCtJqAgUPQtm7gFx_uUzRGLyKthvpEnVKUQ6mBYJoa8c6GGRZQTWUMDA6fHhbNmPIEIekqFqezGJdtXuHHF9-QFaCyi1ddPcZLDmqI-50AcpIV5U9hTWtqegqfGBhvJZsK2YUJABDNm1zmPILibzhCby2DNEkUriEOosNeofKKfCrXCJuR8_7ueGbpnpueTp5mUdOkoDkyPAQp2t7qOrNVyBelub8UjqDwpKREi2LuE9hOqNNIFWzpvFly81PrPxboi2WSPYOJweAUGR-K1BAJSKbWS6tGx-ehepjYCvbNhJ-N1_dlVlBIoTtmWDttjUNlDz2hxY8TNcnymsei3tPG74gadWosHKXai0DiexVIGzLMjeGwRI2CkxSe-sskaF9hx9DIiD8lEpjZlyZlgbVxpghdjS0khX5Eb7JF61cdrqOyJ2ATHSSRnoDPOLozDsNevIuCiXsO_i5wfxfdbSvmveqSD4qViUTEm8XErc4Y_OuU2iiATb2wetOWKR1YUE7A9wZpfKMQSDtRzXovO34wWUjOm4kZAMKdXr3nE4NMHYdjJ_oAP-SxcibSC2OuqfEliFat-qgsZB8mxOvp7maKy1BlCotUneLMclfXPnhJbUUofsSyag-tFvyo-0uiM-JbFhLvOPgkOqauN52aJaksY9ktpbjMF32Ed6BohCaR9qeZ_loE_jIJCH4RUhjNxx3wlaEmtlwSZPByS2ix9l_pvGKIKBgeWext1dSB-MZYRLFyzIeOOONQVMpSaNMKz4ietseBfNuKk3uOwDkOlMOUy2dMQ7ruHleOv5gSs6JO70oqMiDEJGfxx84d2ytJ2ASk5GSc820fHwGsaHRA3dUspLWoqVeq7EKcsxKATdAdxbXB4Uosl-TWcZ0p36Kg6kql6oYk_tCN4BJhu0O3zQac4MKj5_8wjrW_KbAj9DJgzv3MiafR2X9-FRLC7_0DssrAwTlMIxRr-olVTpOIF26zl9mShTY3ZEA", "priv": "uCM4b1UrxQIuPvS-wIq9I4-kehldr520pg0W7jE0laU" } Figure 13: HPKE-10 Private JWK { "protected": "eyJhbGciOiJIUEtFLTEwIiwia2lkIjoiYTZTM0NGZmx5Ui0tM1RfQ09PaWlXbC1Rb2dHdmpKZEJIbFlqVXZTZ1lfVSJ9", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "encrypted_key": "VDzycd93m02BgbO7ChprDh92-r4jtEmi2BwGuu-veTVIYohLOEnuhvAzNcA3hlVVOX40GX6w4OKJoG7bB1bSUGjDNqsCgZBk6gKP9Ne31YwgQEMkJ57XSDpx38wMpwR_hVIJmcdS9fLsndkSNWTITI1iUL2gG-XFmfcTz99bJvwzJ0Q7BhAsz65KNxu4OE2zfAYc-HTe2hMdjQE-m1Bofj-JnYb7fU9pwIqjy4bC6t39FloK8fbv0Vzxucr75Puy8uIoGLgTwBTT9pNJHRKr2szVskmj_q2gA9AXSoSoIw5wnWojGkWy5oKoXU0w9-cMuoMgRzcaGDQhroTjC2KWGsamvg-tpL8DhmfbFSRhjl0a7wo6ktHq-uUgnJveNryxvdem_I8-PJqmm6EpPnOdVpDn-YHqeV-GufWtSZfrvFzkMlkSP0ARaTjpWyvfQ1YafDoFwplawuX8mfkusLbjEpyy5tAr7QcDFzIV9hqg1YcxZeoacHIG9mdixD3wquCDtvnYZJsOLGdMrOsBv3iI0UoPgpfLHCuVpxLYuKebFwPxLKv-eCcl_B6rxqL3V47XNZ3oODqNW6zza6-SaO9ZvW_qHRiOurzdKcvfchgbu_ZZfc8bhE6ZORTu3IFcDrrJg2UxI6kNP4vjyVw5bk9iXhgEUXKOUlhcM2Kx_Mi3a-nJ3_xzKLENWKXL4DTdLgUec9BFW0WBHLx97lst3vbTpSerbf1KAHibY6gzGU5rRpxJ1y-D_RHJBYGfDq-NAYyjrLU4pvJZ7jsWcCjiVhDZs6hbAdl8Q89TJYH9bmVD9ycRugg3BLf1z4xKihGOtzXx9Zg4d6LK5_0EPr74nCSzMhUeJ_RUZ-2fz18hxnt1Z7x9D8WZ7mZHNGyp0vgvd09iPoK0zTGbxf-lfvRnlZ2jgzvcfeNr_nwlepgoyGmnEk3cHy8arVPobC9A9YumtChq2AL6krrKiW5PYYjUUOwbUILd79Nw5o_JXr24EUkT7usMhRxiFlx3W7A-bxapuC3alm48hIUBoj_vETyginrQ-JApzEbM5Si-hlRomgTu8xeEI5dRjJtbHds4f3mwHq-TXZ0vMOo7D42DFOO-wcQKKGyAAC0Z2y9_U2khqq91gSjSL_DuXYzYEI1KeKlHeHNWtsen_UOEDaUBieVbx3W2vVKBFfIxJ8HbSu0gdOsHm4Ffa2Aur6FvvG2M67NFcleE9R-3_-fBljPKBLI7YHR7ebKMqMUT9AoQtKKNWpck6MuED6xjtcOHqEJvM_Czap_-sMHmmKIt1vsbUWLOyTDw72fl3awQJ4ouW4vZlJz0zAW1QS4Ht7I4qZ0vQ0_zQt2qvmC8jf3CnbCmQF42TfFC7Jg50aS7KcCKnWxmvjGe14JqZq1RFpkm_o4s-daTSBo1xP6MPd6d2oojPO-cfMtpssRmvBjw7XqikFXE9pouqG8JMvl1QxxpIrG7Xw474tsjAp4LfKAfa2fcuK12JlPdVw", "ciphertext": "bEKvmLNeGhm1mkLNQ8lSFdeGNjVGOXsEPPyp29pzjEoTiW_pP6nEEOk2F7u6Iu4Gds2mQZDijV3KSYYJ3A-oY1RA2OOq_71N0WynRiNZoBPiSaxNYTA26ha3iQobCxUb7t7XKwQXnfIBumr_Hsb-NwOVM-zj2Ux5OmHOAAqdCB1QUd8Xh2l_PlBJ1FJmbm3R8CnEFrn5Rf0e7mh-tWP1Z5pQoA1_dKaRCBDas4EtI3Vb9gHXZbBg4Bcuyu50clHTxP60g2DXiSuL2b5AIwGiEur8IaXCTjRA93QTLHUJiqBQWi5VcjbGZjAC7NRX6PdqX3b7pQEQlDj3G5mmIyJnYqrwvm-DPIzCdSyefEPo11IrWRfp-1sy18xYVy9GGuCpnw" } Figure 14: HPKE-10 Flattened JWE JSON Serialization eyJhbGciOiJIUEtFLTEwIiwia2lkIjoiYTZTM0NGZmx5Ui0tM1RfQ09PaWlXbC1Rb2dHdmpKZEJIbFlqVXZTZ1lfVSJ9.wzAce3W67vBDznwSud70PuFAzU3b0YNkXFvA6XL0x3VZ4CnjiXQudcgot9tVpdFkmVGAHQNg5SSnVsjE46nRlAjiIqfSiNFUGeDDFcoqIpqbM4nQP7U8bJBRHVwWCkTkklmgxuisYVSR1Z_DDys7xC_3v2MuVFtY3fciZCDuGq5A72R0ghlg61fOpOyIGRyEfsOoyfBmlUBds6NUKn5rpNqBGlCMCut7wes_Yyl2S06j0JZ5gmzhJKsKXkoAAcPBRquJLeaBKOXOdHNwu4lhAaUcuBnhrM6bBDiulcjQKeSjtyMn_MulAjxFfoiheSf-4mvceV2TZeRZ4elzCRSII7zV2tKrVaXJOMepemql2KqyOVSA0R7AmjGPxCOKL_QQAPFzI4HaxXWydcylnUY7k_oDfG9m0S_tQd90MprUSCJw2wA4mgjAVu4BjOuZbPPoRDwdfyvmBfsmoIG-HEROY7VMzRBlcD2mYeOgBBrldteOd4TRtr4c4hQDCaI431sFYQ2iqMsD3BOF0R9yiwpmzumvrNU6da6M4QO0arKFUtlk65MkfnLUzgE6xBFMgOkjkPLwfvnTFVJMmXoEz79LFkdCxu0w0N54mobig2W4EpxA9czXgYhU80dZhNHaInx82Gu7ULNhFcOS-odtCojY3x5yVFFLtozMPNcMfdG_ThA6S5-l9WWXsDgr9Brz_FldsWZGSb5aM66bNDacUdkXeAu72jdhTJElzcWmvH_YWx1O9L4kJj-wrwW2zGfI7Aq-Iek1Trf0lXpayXgq1d-WBsCDzTM_UIjf3S0FIqPJouahe8CoATtW3_DGis4cQnY3QzRIiZYx8AjC2B_3WXLxIzNnc8YXwZ5OzHakpZsF3ry0Azkh_NaR5DO5JCG13F3l9BhrX8dvfEbNunFbfRjHsJKzEcjhQERiKeFzGnO6DPe7WuWRm8Z0R_d_DMa2uAqUmRqg8hsYDkMiilBXYfkdUkdQJV8uJ07Rpv800aywHI7cBWEPRX7msyKkF4lnqaDCHUYBjXC0ZgWiYSPNXfbGJ3oYTGvU35Fr_-ekj2TOaW_Q9K9CKjH1hkwfwz48dvVHYdARRmXRp44jouLlXPw_9HI-N3mUjxEhPqnwHaLjUya6nNR9b7u4_gyNFirZH6zak9Pzl4GPMmAozyffqCE7yG_ksPnJk9gtJoVSwIGKHef2d_1m0Mx5dVvXIUq60C2AFMV5SOJpc8cjkfkKmJq7qRL29GqnTxRywI-SvshAk07r0g0AisjPEh3crwxh7nhyQga9oDNF447Hch9zoujYC1LkElm7ybofBI8cnXe-cedIXZC3gd8knQLZWHGdqjM_UFmP8u5eT8R1JKSL2Pp0Jj_7LSMcv_mc66tdJpoLyzzp4w18NS9u23HrzBMSPhSrRl_wqZCwWVWx1WQfU2bWUq_o5xhJcmVvHuR5Q4RlKxNOoRoRdqLnjRu77zb0AJce6937yBI6vsO0UBgLM7JJSw..mTZq6R_1yLiGAihJ5jmjFmE6hqXEWjGLZJ383eMnZsMxYNNj0paBq1YWDtA6cpIJhyJUwqULwb53TxfnDqfbWowCU3HEK-DBy8IM_pZyuTptIKGWiPA3Z2L5kAE6MMW394R6e18-Fo_0aYjD0Z4XTEi4mxe7dd43gQ4qqMidZGNnMZ1XkVTS_xW5Xx8O9a5sA3AzLPG6BPiFPqDQs_8EV0HVwQqFxnzxTiRPjeBYME10hTKn-Ao9vWgDxXenjWtGkpTfT3uwY_QTKN8_9EwjM-2Cn7sVzKZZUGby1Oo-5PQmku0n1C285aR_VNPR8CXcRALArA9wLZ8bBigX7gqJNec_kaunz4CVZNmJOabEih27kMl2VwU0NUtm2W-dL1pWYg. Skokan & Campbell Expires 12 August 2026 [Page 18] Internet-Draft JOSE HPKE PQ February 2026 Figure 15: HPKE-10 JWE Compact Serialization A.6. HPKE-10-KE { "kty": "AKP", "alg": "HPKE-10-KE", "kid": "Xm6lJa_lUA0szEe-830gP_eXOVMebXlypAKquOzYaI4", "pub": "7BGc3VNf0-Qtnkh39mc9TKQQdNZ2CKPOI0kfuMxepdoEhpCMDbiFCFGQAbKlsxY4-9aepuB_3zdrdFO1NIbOnMy9WTC4tQloATJhdZpsC0gDzhku0fgjH_d7HSgwFVQlTWKJoimHYWCC-0trP7LK3hd0ugpYYcMEaJditNQG9LsaSuOAJww4s0LD74cpsfEEYpKjSedpxXprMXBC21SRd9OV3QGbK-TOCxHM_TQ9HCUzZmh8CpFMa0CsmVRgAFVCaQuEuRMKkJpXT7cKaTqlGKySDDhQYJtxu7GjmxS1kbGl7aG2kmmgxLBDCkobm5ElnSciFIyXPLlpuva6ZgqUedmJKcpea_RI3JoLTSGFJVOCOUVGQGhF75Vj-qCPNpkxQOoWIuxWNzhMHshB9MxoQgpfNpfGHpMMYNlqiZnGX4ydIax0xZmuhbGtAKqSD-G6v8OC6IaPv7vA89hJurESDgBnSTWCjXAXUirGG6QKyDANwFwteupljIuACwiFs2NQ-pq8mXOiFcnIQJaI5pAoMTNJgemcORLHpBY-1Aqgc0gmvKeP1xuI8ThupGoABVNJHFtc-pnMWqq6_HxVLAkSnEO_6mRsnSl3niILCqlLfPPI3DgCw9OLXERwP6udNERGNty6bhi4UjwbfhE1dDZMQ7zMLwnQSVw6sfWQjdC6XzZZKdamMlRlKqpnsDKUGis2Bzs8VjsxDDOdJCu3n3UxBJZwP0eR1PSkKghSJVmuGmml8JociFAxARgWKdpyDQGdHpNVjSorX8WPZZa1BMy2RtMiDoykWFiHKrMoTgpWncB4aEBLR8lTXRKckKdCRgFllsoKx4SIjuSGxSKheYl7-7GAC2V4kCVCBUetyiFUVomBeBHLmkNf8zkDfMa8-iuv0vRw61wkB3hHdaBQx_htHrUuKlIfQkyyBNWkxnCq5eJjS2emO7qvJcSZWQRWJdwrYPMm1Dok9BCVxvImElsSqTWlHEmAHmVJ1uQ2MvAK2MEktKfKnCdWnJCcVHWtPEQ-svJJn3lOL4GpIDqIznauVZYyOBNVBznHpOkIXIUtLFwg4uFMrNrFybKBjfq26OR__-AdIbGASUArIaVVJCCWQQIcZ3wCugiIx0SacAKV3HU3TVqCgGDIJIy_rce-1mshNHKeSimgZ9UyL_hzMzkGTFmK5TWROddjUWHPFSZ8FtiO5MY54Ty-KfpaSHjJDNLH3iq2MxsipZY4xBSp8OxEKciXnDgzRLAPscAgXjtutdJKSgga9qKZM0BkzOKI--Ztf5kXsDQoM9KtNts0lMKsEDCqMMZS_7KqsvcC5jmku_x3y9bKBzBoK5eE6Re5X5kANNoUBKmXTWjDNPPNJpAr8lnFWqm4EemlECwYxGBWmjCFPKa8VPNV6dnEfPdb-QHHFuYrMqVjStSvOunJNAk5QmQq07M2esrJl9U1EDEXKYiUXjmoM1oj8vEGQeazWcQm8wIC9aTDH6FYasZ1CnWGJkukE9R9QVRzMLzN8GaZ-aYm-ekbGidpa2GgYfo28bpiYJ7TorXxIzD7dccmDg_zPILaV1-ya9d2JLdz_4rZZQ42f67fHMmE93JkGCO5fInubiEUsxGRfENaU7KlDJzQJg", "priv": "Qaa29navsF7XGQ2OMq6X9N1eB1WTrW1v-NSiOctY7YM" } Figure 16: HPKE-10-KE Private JWK { "protected": "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", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "iv": "1-TNketin2DrWVAP", "ciphertext": "fzV5uM6AqRNg832UWliKrNMWCnjMEQQO5KBcvHBQsQmGKcNmuwzs7JqJwzYQEwqiL7iGIpJ2hpKd-432n_E72KzlugqGtOxQUjiTFOT2KdfhdOkSUbYr0AdTmwaE4U1gOSKIPPtufolUjhF26b7W5WHPX1bcQIL1MvtJCG889OkZ-5vADUYJc2NJ88BZQ7CxYnpUd9K-cBKTcO96HY9KUCfgUO_5coDOcJKe97hCUYN8tluyeKZBRKCEn8DNElLemTweOGUcW_b1arpvvi9xIx5TJK1x-XKvqMAieDqPEq2uij4VVsnGkkpe_iAdCHAlCbltI3sZDEKDbbWWH5LrzpXb7kwoNroKTU2LVIp7OM4U", "tag": "PYzkgIA22naRoXLWPaLvRw", "encrypted_key": "Yl52JxIODY0hQAxV7oQ1BL6gC-ennjuA08vZ1XXPnt94TsgUpFZdT60dq0Di0SgC" } Figure 17: HPKE-10-KE Flattened JWE JSON Serialization 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.CCbUgX0KG6-I_zTbamEUOZaKxWEaNQa5JhhTmIovBtD2b-8QDy8XuOeEl3Zyb5At.h-w7sa3cWuxCst_u.-dHH2g1WEBE3lOcWjXtQfwSjSwuk1yEhVju4YQ5NLe82S0-VrgIgTcBtuUhcFv2qg100zWubrmKY4SBeskLi24VKeX-8dOZ8ZeGu4tmVfvSKM9V7PYEcvuDGn6lz-oWQxjba1r97r0eEgFYiBAc9q141AoZeIXGv7CdTGpvYaTZYfNc62IEmUtKafXS6PhzAspCY0i8_4MwItTa0VuB2cUCjlgFdPL0BRi5h7dGyo_sf-myRFQ6oCU0ejgp4lGxyZ7mVATz9TpA4Ki9RIsjfL4BiQfW2hWR8rujGhoo_ovwAHWLI8zNf5Wz6FvRrgTsaRSb8Lo7pyUCMppW93qujj3oa2oRu6htv9waXiSZpwC9Y.absbwmpYW35HUm-hSd6HaA Figure 18: HPKE-10-KE JWE Compact Serialization A.7. HPKE-11 { "kty": "AKP", "alg": "HPKE-11", "kid": "oATA96dt4yMW31bur8UcRzxVBNV0Y0x30-NZ8x6dW3A", "pub": "rtOlgemxnEE1spKpxRZjEawan7uQlgA4JPQKxViqjZE_ITiUd_cA3PQJRmVLGefIIODEIZqgoHhX2qLIRDhY2oIMcQFsDsuzX2G18BcGIYNiUGU9YzoEsEat-KDELTJTirkaA8ODJnlPeJda7oBB08lC4pu6OYDLzQcCt7iYdTCFPbrHH-wIDYIMzfM0bzlINJUTmKAXk6aNCTNAUggxgkaTRSNU5qUlXzYdjeTGeKoSayMUiXK2Y9ewM3qV3pvBbmkVPqR_uahgtkk-81QbnOEho1mZVVGDkHdn6bMWiYBYQfQVvmRxhifD17TNMlLKYHROUudxoaZt_aMBBzc-dSV6KtcE1ykdknmd6hMA1qFGq2kO5dk11ChLHQt0LCGDa7kVodnMy1HCbIMj-IF3d5tEw0Uwh2Y2lUSODKO_S4aJjAGcolp1RPGftKhh73OqpwpptcYpeeaDPUxbJHYW3yaygfpjjKgpQiog6OzGcfDIyAKkefFRiQQfdBMEercKFqgnjpN03zePQlYEjtpcNyhtg4mkcDUQfKJ5FqGbenY6DwHF3LyT3kTG-NljCamDcrQPA0ldXJPPTYwLPZlyzPtQRTPBhrhC-7se90g38tOXP-N9Sbax8fWtP-ykQQbBQQk9Pled82hrRWyg5gXBnSc__OIDSbEUIMMFhqy-UrqnrkMzXxq5vwgp7RQBWTQKrwGZjICbOMiPiDlQ4GTD8BUqmRgUW0mXeaiRtMoeIzzHwpQpDLEMsCddfskNIpV4deJqcfi_8CVRY1LBrZyXvVypmsSx_nSJb8k8S9WrBafG-DAZtAO8UAMmBnvOw6eaf7RuqVypexAkvsYW3bpFcAjLGaqqVuQPChSBRUQot-WxmBdET0kkTOUCLMpeK9nEi3Zi_jqG44lR9Hm7ZmfColYHhLguMKduKut03Th6TuhssuotLVmO-si2arOWWzRgB-tcAhcfRWDIgCcOHEmQfKAYw2RRTcS84zvHoGBdCSA2ILzGAHBESQAcvoc0SWvIons9yLSvaZZrpudSHDoV5XDMbNtCIcx4OsxIc_vEYSCFDPxLlcK5MNWzaGV4_Opgn5a89LcTyLgSukxsSaFxsvmhLnDI-axYvTezhzatjfmhYwg2VcVNOyQymau1GXXAnneS-9uwGEWXEEgA4JLI8zqVESOajMJQNtqhdYAPVfOKn1lJKPpz73abLNlU-JI6NxGSsapQiMfLbpIEHKhP7Pc1hzg4nnwmZ2xgnYwWUski4lCqeWKRiRSYEqqL1-SMDMHKJRs04kWZ_HVBbPkXLAzOajAXksFbBCt9NLwkhfRNnbVzQAe5CBAfUNUYyFuxWyw8IGZkvnIHngyKgVGztQVOkHGPnhWA1kgn4QFdyKuHPNNwEnh4EpNQBLXBe1Bmq6MwPOJ7U9SrwnuDRtGCU0u2WuyIBZq-kPNE6Rpe44ZEKuWflFoMqBIFZspuJRvOKJteINN2NCk3zKKTamYpmNqI8FxdXHF3Kix-pNdn4MyWy6CXBStwXUiMKiF2rLBvCh1N2kgtbkZSh1SM3Lf7EwK5vBHKgtzFMncy0jTUHWKLpyYut0fp1cyud8VefH6I4YWjqUg-IPY-XTna20PnMQ", "priv": "fhCGTZ2DqLNXWjKdD8z7uSd28DZfYszfPpv4ndr44oc" } Figure 19: HPKE-11 Private JWK { "protected": "eyJhbGciOiJIUEtFLTExIiwia2lkIjoib0FUQTk2ZHQ0eU1XMzFidXI4VWNSenhWQk5WMFkweDMwLU5aOHg2ZFczQSJ9", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "encrypted_key": "fTSIrdEBYblWybEHWNZ5dVy6o_4iQu89alYtPbkuC-8yS7lzXiRyQhfi3GFKrj3HjCoExpa0xI8I7YbiGLNDcqnS5Kk-CHSWsvhYM1OqusTwYXicPJuJtWEm8KkPsRlaY8aaosXGxSBfiIOXF4SS4aeDi8qrVUNhc-8yMTcjxrmtT2NZPCwSiCqnhutmklNSs8liopmgSkAyUBNCbIpLWOpPm5OR3pJ3yFqm3MUCjh1e3qvrh_96iQNJJTWy93xwEaYFk-MvoouRDy_mzVyd9bBTg6CJ8QyFIzbGBDTdOLbxKh83YrwBG5rvIdNnbx3ugNc94xlQ283pyNT6gERgyiTIQI_ifV9N7LhDRMwaGTjY5Acv2FWG6rIsyedMPcZqQhvUS29YLkkR4A2R4w8Pz_QzUNNJKhePWZ1U-9HgTmP3zAQ3aTiscDNnwcA4r2l9BaNjNMsgh8bb_B6ZvucN4ZFRQcqvSjWhZTmVdOFuuC4TppvA3fvWpRCu3Pq4NkOKfRySuIQ3D47ovgSgY6AWvIxssrPs7gf0BP_SzgP6pI1oeGLOXdOMFwwKdP7VVlW-yNd3KZuC-93EXBplVs4_zlmBrFR7ENxZ0pS_ME4wQYH_muacX8VypPltvSrx7vABkHdNnkZKJmlNku-wxmc4SxRrzbCg-oN9ebSeX3me-1FVQXxEjM0cq5_ZGeb7aAkDryxxfwS2SxTETd9aazR4ee2MKTIqo_Un7V0JUwjPJwV92FL3OIvv2pDktuYyaXrxGzhHrpzJtwZeDds_4qJ_WODXkF_4Kcmd_a-w754LO6fbhp2xTAeqvMJi6RIIaunA-vzJKhl576An5E7-FbOmAb0lZlRdanWr5z4IZ3KC7x87mB28Wxi_bhiT3grX3PAfdnI9hDz6F7X7Rjjq78LWK0grili4z1VDx2f5aNijlktMZZvzKkQAou8f5OCvZ1wv0Hi5fRFMQpK6As8XjdBYApQEPcrRFmdHwp3kuSCxt43KIkYJ99zC4tfZ36VZHO2at39PCaMPRAmi8h1Qg8caIR7kO2Y7INiKDJ6JvY6jJxCtw91Dx2-Mn-KOqIyb_PSBqgexK9myfYkVor05bg1d-dIfAbV5ZTv68g6z6RAj5G2Lm7vfdmjhhiNjQYeYCreFg0cZaKqcwRpPJokKW8vangv3ldqcj5oBp6eqnSkwj6PuHbNvTcbBiffXQLkgyUBAENPwpjEzdLdreNs3MLCnv7SVtEmrCnnDfmUGoi15C_MdmCtztZO_YH-o6e_L8MlJChU5YUxWlN19lpr_CSlLbhjH7HO2Jol3MM21Ro3TtW-fk4EVItP1N1vKJpCksTJpeLZRfTlr76jmZqUZW6qik8ZQiENHlxtG7KKhyfJAMzzOjywNOJDQq6cHIaWiFI1pjOw-K1NMEDB7NEQNHteZLCZOycDmxnjWpDMB_9p2kfU7JY1gQbQwulLVDoVDEkLVB0PP7pITYEV2pVNu91GwDg", "ciphertext": "Dhkcafzism5hwZHcEOiNQv4CKCbL7zQhHamZ02dGXV1gcik0REe6O-LhHTsrqKvMbkKBo84Jyw8t3rw7L5m_X5g_yv46FHfV97ym0fnF5s8tND-F55-7J8eOrYkyn9C4Fpojt8L08cHSU-gkFMpDfoOa3wBTCiTpX0V5hbPwKBJo1waLl-2GMRrPdh-hJiWT3qBYw2yO9nzyOnyEV2Pn8IjjXHzQmJds9VAUC9tOIs39d2BwV0VyueySceDRwnoKUVHzwOkonyUaUpg66OnE_0GjARyogFdqI92Jd6_Hb6ASxFO12cGVqXR77cPE2WKG84Mx9D3UKy0SsWSOc0jFOANvaOwbzca-XcSri0Pq6ljA-U0j-QQYjHOvo8coPSspbg" } Skokan & Campbell Expires 12 August 2026 [Page 19] Internet-Draft JOSE HPKE PQ February 2026 Figure 20: HPKE-11 Flattened JWE JSON Serialization eyJhbGciOiJIUEtFLTExIiwia2lkIjoib0FUQTk2ZHQ0eU1XMzFidXI4VWNSenhWQk5WMFkweDMwLU5aOHg2ZFczQSJ9.8xYP0x1f5Vx5Zr-5Ia0t3Hohqo70_ATNEU4-luULrhYaMIrr9iWmumRtgU_2gKkhTgd3Eg9FN9EHMqPHURMnejjR964pLhOAaWc76n82huEZkrfrBpbgQ88z75ajMoOIdyKrD2fcuSVyk5oLmvLxAfyR46iV3LPWMXpR1AEEmPrcQ2zgzc2GNjQuwA33Hed_JfDqIRo-rWASIA9uP_JZAKqyDc6X4kygyaUl-W-TIYs8-LiR7SbQbKyN05T3i-6Cx_ym3_-Cu9Zl_5KJFT2NBWkwKNE07m6yzr28ArOtxnLKpIfZT2LdFKi9x8k_qjdCQgTenjF5xw0Yd1lfj9ykAvKLAElQ8JMmXaKmF-IRtSxbD9B-zCDNKc1XY3KuVzNuhH3Aj435JXV5oZEik-8lBsuSQq5cKw_GXzfwRei0k_4uzEIGgzruFxR4lAIuqAWCx35_8VHPxgUqBei6kDr_ZUrEBiVKuSt0H7U_ooVDSg_IRIlC3uCvRQIeu20Lma_k7GMu-klS8GZK_9LIc7kfbhl7jh0mKaPMTMmr21twEjMTz2kqAXVU6OwMtR2YG4CJhNDjtfD81ZJP2MGYUqVLzvNL4cQ0zZE4eUGxG2NdDjfmt4ths85oXVpqQ9L7AeK1jeAojC8zi48eCtmDBsO06YEghNSJ86f9rZIRDvzXwuAWuRQvj05x7nDGw4b0GdCtJw7ciUmetx-HqlYQACSztgGbZ9z5L9NAsj32sA8FIp6MZDTtEpdKEQVjQzSbppwmoVQiDKItu0X9bQbmZu4gtv5eHesCSCcdAgDivS6czMGol26xNPiYouru6ph3m6Zv8gGjf7clEG5kiYewGefW8cRdLXClfEGGTJJn29BLFId1NQ_7F9wTAp6fqgnKOzWVMpkF3Z1XkQLyn8ugworwXgMfxcCTcAUMMvHFeLWKkQNXWYYotJxVhZYpMP9usq38v764YCxPeSellISGFM-_5uyuo8ghISJxxgP4I0ZJ8QIdX02WFF6R5BFwmv45wysNElHlHGWFQgHr2-hbMx7xcnukEmZFs2QRaUZj0q6ip9b0TKM0-XtHBEbavR4qwEpe1q06uw7l_imQ9MpwU8GeJihxN8AuddUmTJcj0iA22RAmUPD7XpasPC62VRq-rx9bi7FaUmZfEmx3Ml8gKMxR-_ou6pRDzHOAl_B77hYeklKgbtqkdS6soJFpXviXUZgwCCEiBAgKxtmJZoDNsX6mB9pOljPHn9RzCry6xAMiWgSNblmxsv_BxKCW3bHJmx11hsmnV4ABIl_PIL3-qingouxIp0t3HvCEK0-QxaOdmQ8ERvbFjPkiVtl17yt0RSdF07s24GsHGGEx5LoaF1_5hnIeOZVh5p0gzhbbCH-M1ZkIgCJ6sEBfUUAg7OILZOavDEkToc3pANfhWPjobYKPsF_8m2L6iAq7_TVMnXRB4afgUYxWYv4LB4FFase1KpPgSw2g7WJ2Ecnryznc5icSHg..8SpXD2Tg30qLypKNXKeGHHEawWe-BLAB1jtRgCFc5WW21V9ZhMWoCZp5Ia2wxwzNisWDvD1NeW7ZhSGfsNj5d76lCLFDqexDfzKT-ePtlLx-RTgbuQJSUUB7kLdtDn5szRUFaELsJjul0A-IODMaFJoJp5ysROBjb8Xw4eBcvRYtBtnW56gRsF6rK5eqSI3W-ih0s_725QnHMGQQV2Oxzi2erHVCFZaESg8WxEpEctTuX8-EFoMlUQHUKJP9SzGDrbPtm1Z7EeH0occBB0fdDdu30jm7WXBwXDMvHm3_yoHCiO2TqPWyUW5HGxUJBaR6SyPviHL3APMlYZa7aHBnQvCzT77ZgzR4ENH5gkZaOuQzdMM24Ab3NKM_HV7XCb89eA. Figure 21: HPKE-11 JWE Compact Serialization A.8. HPKE-11-KE { "kty": "AKP", "alg": "HPKE-11-KE", "kid": "16yw6KY41e407komeO6qxf7YL28xG0UNh9TkrMAgTsw", "pub": "lKq4-lnE13ccmSgduMxLqbPAeVCW49W_HRc0LZN74BpbXtd3vBour6MEzvNTPOxCFUNadTdY-FkEDlu5vzZCtEGv5ja9TuyY1MC2D7rGIyQLt1E-jYGlgnHDWRBGh1AKT4y5VDzKp4WGCWHBbrueXJkTy_pAsqLNONceBTHMNZszg3q4Gwd3frc4UEnKi8yexpLDUhyyf3NCQ_ijZaCePMRL2eS8XLhhzDow7Hh0AHFzddQKTFnMCQtb_xJZgdTOrRqfx4LBJlPKSgVy6IV7VzJU0HQ-pcV7LOhbX-RzzscWFiSnQGpUxTx_jUy7QWxk7BVUlnMFPHRs7jIjSYhNVMybE-ul68fEW4mRhZQGEoomLRgAgGhBUrIjXyAJghwTczOyFdvDqOokziKMH9BT1DAYDPsh1bVLVhUypYwVZJkOzvhMf3gY48Ehg5Z8SigNvetrKIp0S4GKBRJmQgcnqsKEEyNlqESOmTduYzclyvlaK_WbxRlS7cELH2KLNoO3DjeY1aWy3VgHzDnDAtAMDFlIh6hW57Z_FAJgDsOyw1w3xaonSkBzXeq6EJEK9Lh2yBKlWHKpGxNlLBaWNMUNZyQbYrBPzUQSr3FAoMzM0cgd6ixYOBax6KQCdEee0vmO36vDr-BjhHIWDsM7FnXHMIVoBimzpxtAoSm7BgGRR7C8L0Sx3QUxNnAy87WZm1wzY5BbkMUImIRc-ImI6pAimXS11Ry3QZKfFIoPbgoWP3CSDlWsUvW1zsPHtKFQB6ctZqA9dsxUGIlvz_NU1lRmxCikX_i5D7ODyGtO20Qc-JRfN0Gz--AZBvUBnuERU0l6T4VfrGnAjloaHXE3-dmH2WGZfFsN5jmuDjF6TftXkGAd4XSCTeBRK8bJXMMEfgwySWkJ1paBqKgcz_kdxAdq_YgqJnBVXpuySakJpFFZRVdwy4pPFGTEG9efyNA4cytF-dcES8CdosoQuhZECCgt1DmKwDeIzMQblYdAzLGmUPFm-kh9PIiSj2RbZMRqUWujP1Ih9tqZszsYk0O14PCqg6Q5srZV6KuJcIal13mGKmPIoNuY2hagL8Cm8SgPkIwJxspIuPdFAFMVW0skQgKvE5kr54uJqkks6fWNCcwrOsleZQgghAFBPUeCAaPJs6ahpARdRAAXXGe0wHBZtCCMCisLmgeY96lb2IejO-GxXpIVkKQW5rqnuRYV0bo-TQm3eqZ8Zle9JImoe4gAEDpKubuBsBYiJdDG0vKV_OCbqVo7RjfOOOII_JVgcPSHIMY_7wK3vMVm_9sVLgwTlgY3aeOf2xc2WuxB8CorF_YEXubAUvpmBTGvy_PMjBCOP-ZKmXjH0-QeWkozUHwI9PoIx5cN6CAup8N-UnBETUGo86Y0jvVppHQ_I_HDSsaxPwZG6xpIlot_-9ZBFSARk_CXTBaUnFoD9pyhNhorZwwzq1B60uGsATVAawNUnYzLA3BHm8pVqQujN8OccpwNoVA_J3pNHbmsM3ZSr1FOOoiiemIrzHSii1RtFjs5qemnMNyx1W3RehOz9jm3l2iiwsHMvqzWvDkHCLDW-62p7XiswDjQzsndtR18lIDU-qywIMTYeOB6mS8yrAbnL_Gib3jqSQ", "priv": "2VXc3UQXfKmSzSm0X88gL36qs_QJMPYyhQ3jHiIF1UM" } Figure 22: HPKE-11-KE Private JWK { "protected": "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", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "iv": "cg0f-dpji5qHsko5", "ciphertext": "0kgNEY2Uu1dYAhc1--H00VfnQFJ_FPoYxPmqRyQdv1U624O-oFv2WXraV2ML4nMmKPpVYV6CSrlNWMzPgkSL-JFqi7xdaXhwXcdUoFWcCdhSNdywiCidhAMDkTkZ7hBWscslaVtzvpoFyDdqaOHQL7Ybh-UaNgwv7Mvr9ReHyVP34pdbOibvnLiCLIpfqxMYGYqlYk5xV6jzMr08BZM5sQe_G89SIzbp_kOORWIiHEtX7x92fK1zi-pU8fAZX0jYCpg2jnH-bg_NFsYeK2GIpf0pvxDs_1Eq4D1ZDsi61r6qS3wFA5yjZy7GBddRfh6OkwFfd5Aj1xH9N0U6xwj5Zj1QGGY2N7sD7jF94HT1l8lt", "tag": "Fwv6YMW9AqPTR7Rb_HF8aw", "encrypted_key": "LNSoax9Ga2QpxI9jxzEGQNXnKignO9Su9hhWxKs-o5y7DplfHR-xvzmM9EJH8aV8" } Figure 23: HPKE-11-KE Flattened JWE JSON Serialization 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.dSfMqiYf0VBU0_NFc_xhyV8P9QfT9NwL2Prsf_N8bBQEWtVJz8ekaqblI5Y28Dd9.JdlIcfXr_xiVPWp1.Kg09nPOFMWSm-bV6bbZh6k6qpvZOqVn68IzWf418Ifn8eMLCdq_cbUT79yi9JjZq8pPIXs7stQqYhIWjI4W_cXvVv2sGxEMXoy41A_6mYMi2xP5bdxqfwsjo_YjtiSgBjpIutKmjrFlYc4hnUVAW8VTDKi-calET2lJ1b7CvRJsiGrGzM1snQxLjCFwdJdeWrUESw1DmsqYdOsNdPoP9uW9AOe9GCYO5MPpmbywwxPjUZyQi6iTcu2SAfySC-2cp-wkdcUapApormqOP3cWSmVCabIwF-fq_tDxyM0t5ybKhxRWdk8n_-MN1ajVgplT_1RoOhaPNYckI8hzNNbR_eX0owVJ98CelfAnds-PUN36T.SfL3UTfQjrwP6TL-Q2NJbw Figure 24: HPKE-11-KE JWE Compact Serialization A.9. HPKE-12 { "kty": "AKP", "alg": "HPKE-12", "kid": "9hyupt1l9mp8RxMj0gWDx4uZFh-Ltznar1iPyKSOjAI", "pub": "T5e9TgLP4Bh4gVFU_cyS4_iimjOLAvFmPGemydw7nRVhhEu3oncfGINoOfi-fTJIQCvGKOzCPbVarggmVCJkZuFkchMhCeaFA6G-RWAZriFRc5A0XuuE3pJLXHnNj5WfTrOMiboZpVeDfjx1NvTItrI2NKhEhCiJrFZOz1xVy-aOtsMx7pJYR_Gp1ReG2byJ9LCgqeyPyTeGXCdgGBQg2gLFguqGlqmRNGCEkGE6uhUpbehBn9k3CmJtMmMZ_QklIgMebBy1fjWzjnSRXhu0v9A_G3GJQbGDGxuj_Uoj_Ma5BEWOu9ZIKpewyEyMVTqkDwzHGtoAWRKAfVmcImdrRWsvJja0H1hN_uiL-PUY_ZyyVOobGfVXdUgkJbFx7_K68xoCIhKmHgAlzSC878o24UUrIXopgrmL7fJppwhH0-URz_wqtOGlz2tDMUm85CkRzcdTMHqMpmhIYbCSm2dFwNZTZCpfboE0cXRRLHI7C6YFMXFZTGmo-ZpOJ-FT0RMnw2hWnMS7ObuDxvrCSPRdEACseAaCvDN4wRAt1YGN26gVvAo7wIyqT5jDLfiZ05jCmhMQwjNzsYgQGgOwAGHNlIig0lAAaQuFlpUjpEBzsXEc1skNrXuOPyhn7sysibu75LNvc_hsXRgOF3aIKLl7OQBIe9i7Z0pjT-EHCUGLR4CulIscQCc5UKIDb2dC1OAfFfHETWAfhsUKXBmsQKECZ8Rr7GasO2oON3pBJONbXHVVS_Ybngle3di_THMO9YOmNtt1ByI75egWLvOjD4Q2XTdjBnh9o9qa9WQTUqB1YeNzv7yrDtBAFIQecORT89G-pvhnkOcfzWeMrakW80hGfxNCE_UsgcG4f_csFZlophaQ8UGu1sJ5DgeFFNOQ2-AMgHk52LK1pIdQs-ONrndBGzrEEvEEYokRD3UQbwec_eYn_djLGco4VAYdedodBnUbezqYZIugd5xVRsfEB7QRgDcXeByH7tixrxUvckIHIJyngJWKFRUlLCyX8owV-3B6K7VkvkoTFlWbOzqtViGicWw5ApwfNBgVu_hlOAY8bURbWsGLc4wtQ2ZI4_GNfKgTMULH01CMPrst5mNfYvgJsNVqlkNIoCIDzvhZjSjGCHtJOQYQzDx2TpV7eYpiocM943ANKfuz3ICDApETaWYeWFdgn6wS98dDfQFzSwgq6vEGT9mQLhNOGZWdGlJvrVMeExmXsrdim9hsigIrSotrziU8wyKsx8JMl2DMXAiA1UeGJoMWPDAwM9ocVhHF8-p1AjeuGoI3ieqVPuKBufiEO3cwZtwSwRtCR_ZnGDfMioVtVMNPcfUGA_FxyyymKDmQBUoYbwqhTId7zDlK0CgyJuNn2oEa4EYxmmRgkbxo7tl-3QVfXvikqtdjdeRWuye_h5tMgEh9o2O0QmcskTK-R3KTt2HKwRuZe2eBjLudxVx8Dppu2vIodYJ7YIDAoHZQ9haev0du5cCbfpReqjtEbqRYBIhoeRa4lppjcFp4C7N0nFnIAVBGPRnINkCQkWImdiqWMtkPw-w7BmzIXVFAt2FpGWlWkLC--mmk9ctxW-bPU5ctWxgy53A3qUAq7iei8kRCujQnCYpNawRgHPhEOExmybupAQwYS8mXLaRT41cgT9zPxHMtJ9MjugQaayObZhDNWGWRM1oT_qKOb9ChrHNYcsTJShMnPRKEuqrIaHhPflyRzGcMTELK30OqDjzCBue_5GAcNJOd_NkY5Mlb5GkNZFuNvSdNZuWASHCuFrEdl5EEg4FPkuG1OwCfyDEl36Iqe0s72NGrpzClC_inu3iN7uBiewrA5MuaQgArAmeTKzTJ6xlh0acUIFljdSI6fjVIPnQxd0ZgpSi4a-eRNNh7XVx6_FCBUpMx_upRo_dbkum5sykUyFp9lBsU-lG2asWmAECCPOF_vYNxjfZdx8qMORUAlFejtIA7Y1l59Twj_sUpgRt1MqifqHqC1hl6r-TO4nkEpGNIsMlGoZssYXqF8VKqy2xYtOO7z-ekQ4lXuXbGU0p0ispKA6g27jiD_i3cOqthr3qfhE9US8S9vX3Se3fFV1vtqXrmzKf3iHcEGzWdhwMZNnPxSXIbXrgVV7IIfgrDUd-LRuiCU17Y-pOdgA8CRx8uZt9MAuQH-Llt1DZ-Uj9VqTqHXi75vaOmfh9DG19qrZyV2p-IqT_B7fpqd6apRjdO0yN5aybNY-Zq", "priv": "HqetV1Ap1ngNbKSzJfWFZKTK_8QjORJ4iWF6NW0GdV0" } Figure 25: HPKE-12 Private JWK Skokan & Campbell Expires 12 August 2026 [Page 20] Internet-Draft JOSE HPKE PQ February 2026 { "protected": "eyJhbGciOiJIUEtFLTEyIiwia2lkIjoiOWh5dXB0MWw5bXA4UnhNajBnV0R4NHVaRmgtTHR6bmFyMWlQeUtTT2pBSSJ9", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "encrypted_key": "mOKslMw24OI5dL4k7tqGQtuAJFYDzv80cC3Jjj1qDIFOwjEHQpXE6cj3sCsX35X-W9nq8F2sVX5QNAXkeCG3oW-dpOyy9u4lOxLcxDx2L0u4a3kdSNTOFFIRyrQnGjAcRw45RmUZWB2Q0hKRBT-5pkzOnxTbSMSgVJbsztaYYWw34YzJ5rH-UYLsLVSG-gIkV_ZLDn7jiM6uqh9_IctnIDyJXi21-S5VVUNKzBPTe45ZWuaO-bWZVzmfSVbX0V0KeK92I7k3r6Uk5nRBTd5_9tAf4-xZgPR70p0XipvVTtsnfRbBB0AqyCuMqNxOoaUCijogeqA6rrVLfFwrGtiaNlLkloQWgVOWL9tALDoMcSBE874wQ8_WKQSavGAkibe1LPFveg8ak0xTZkTx2LQrDjwtTD8_FIq2e75lmIjtnxYcr0N_bccBVeEhDJ9c_XSBzUyavA659SFxt2pK9HLGSsRr5W60ySkT3ROMipIf2SJ1tkbJcHOgFkofKti9II80G7C91V8i-gkk0En-UiuE5YAnO87oomCcH20rm86TaVVroMqNevsUmGbFwXzxPXMWHSrTemhN5QGj7iWiIngFjmd6W_o5QIuEz_6pCcQoYyxp-EVRP7ZJj--FQJKR5LJQHCrrlCqRXj0fSuq-eraWzbP0jfFmiDWO8J0uIflYq3m1TXoR1P5mx9dPWYF8e9a1p8CldRMwJBbLJe8KW1ylei35Hr7jY1raWMizfR_rCQ2KJtXKoLSmUZ83kx5deEILbg1-VConWamEmCPFsdr9mbiqX5ize8W-xs4G9UT0ZZcIfgLKuQctmIUI50A6EuVQN0zbsjbiIJungaNc559wgkr1McxdwDdc-sVg4X97Csx0_7tDmoqWsKwQbquKfKfArkJmCOcD_LlXIPP9BnKmWIB2GYpUpFiXLqgxvKxAowofMT_KUI1w250GnK6nL8eNa-HjR5y9lpQizUpHkfVRZhDq05ZnqTxt2hTV4lArzsThYjIiv5o3YuyOOQGlRsFPMvU-Ht_fEhhkEbQs0IrJhKRbzFr--S--keDsKHG6MlvehrJf0ZOqmNG8m2KAaLH-UZnuJcephbc5hZit5KHEfRlBno7VOWQUFKdNO5xhgn0F3pZN34xnGCA4zbfuFNWhiE6O3C-y5Ya-O9oiu2IWc49GeS8CRO7s13V-P2jHJm97qfVzBa1SsG6Ue3UjyaDqIf5wXAVbtxW-oCOdHBFJzOkkv6YRUoZDuLXbt_2ghL9M1sONfn4lhkGh77OloU2S_3DESDRQTC6Cj8i3a-5MfsiPBBfUzLtWGAwo3p5BzPZckSFnRj-rA2keculv_gZdbNcFAEd-196zTAKK8zCEssHSDIVR1PQXSmsRmy_GztkcEermDBip-AgTzgP9JbP2GOQB2M7nXVHprAmAr4LJH_x_jdpeKW9TZLIhM7nhNQ6yvWhj0hCEKm1SGb8gTWoJVVM6bSilIzuviKBuLHzPV_0WZPmKNeO3a6Tib7xFhfcN1GgHWxhxQhWlRj2gHUmgioiwjiVncLgRAqStkkGnBIp8GhdxUsoQfv6ydnmyQePGl785KSuj5FkCSQBupSPvURgDrwB1Uo94iBLceF9jfYCa--6m5syebQ7wAPxhmPqXcTaH9q6gh60cwG0rmI_rM5LO-V1ErmzoeA85bPLA62tgUJoQP0P6BWrnsjvNjutK3KdxrfQfSPP_5QT1oCkEoqrA67EN3Zn0WBLnZoWVYyum1XMPx55PMUfd-2ErnKG-4UViW4pNr-TfvQKm4cFG4E6V8KJC0Zg3xRvb3TJTLp6B8tsZL09bkkT46KuliGPuH0EXqG0OyAMqdBFbkKuNBfO8IrIDnX9Guh2U_5Qv-_UadYifMywB1ndqM_V5Tyi6YPg73abAZySg_vG6lBJfY7ZmwmpL3PR5QEUI-bjpk2wna5E4yaNa98ZgdAeDls9ZMPT3KWDH0r9J3eua3yuiqdfzS5r5fDnlJZZU-9213CwZEiZ99B9a5h_IKr5UjLVIM23w6KdPKnA8JAKqkob7HctJR7VQhJQ1SXaV8I-AVMqjcl7Yu-GnZY6TfehVPMYEdC5iKJKvJZVvojyFnZanuONjtfHrJr58P3RG2dYQwruwhheOYewNcci99LObrw_AIHJF3VhqpU93kdX8RDauxZJtYl2kDbVaedgN8P05253i1SCBoUVdBF8w9VUbJalz", "ciphertext": "6HfdMud0wbJkF5pQOcdQYbyl4IeJhdfWzlm7oZTlVCz32V1Oc5ls5XQEOpaHEYUQ_DeKi6rIZbTrPfpkt2OEFLadbL9sJrDhWxxunlAOfrSF-_cbp0gb7qA2OYCC_gfhTD3yVrKIAtNf2E0B4W9RUGg3emqynHOa5A54GT4WHSW7P7KCiAbibiuBFwcEH9GBxy_c3UOEcfPeytw8oEUhIGTApMgAT28m6qUaZv_-saa-441Cqz8TIg4tLnZi6ir_PGALRXB_lv4K7iXIhChVZKzNxb60dN8Ka0BYsfh1pp8Bg9RduA1vaaK89KmnmZSMUB08xhykJnLurS1eaiLo75yIg7ebaIkmHObjgKMQYR6XWVws5Y8ofN_R49GjCIEXMg" } Figure 26: HPKE-12 Flattened JWE JSON Serialization eyJhbGciOiJIUEtFLTEyIiwia2lkIjoiOWh5dXB0MWw5bXA4UnhNajBnV0R4NHVaRmgtTHR6bmFyMWlQeUtTT2pBSSJ9.BBkqIHG9zOgCdcTtbrFZFzjenqoHnnnpNc3BO9Q26GkwQ7NlKnIzNuHBltZTSclj8qS050mnCThc5IQ0t_ba-OVprlkUvcUxUVpfblG3znGmZ8gqHOMOajxu4XSs1An4J0n-oa-nApPZMCLf9cUgWHBRK8Bb1_mHBFz2sKrlzeuBNe791X8CgbmLHpwKgOjM43P5dfp_84X3lPp7usb43itWyACU5m-iiLNnL_6o4uunKheCv-hw0BH5AF08y8xqku_3j29kqF3Hi2g622bKm_T17JuNq9BRY_OeJLxuExoWNzULuFkk_OVfl46DMU7jTggkcbvWO0Eo67u5UTRZQaJsee2LL_Q2S45jwOGTx7JSyOANVUH_ypTNtIl8AW5N0iV9p_-UVsS_szMea5tiaJVZMSOJNngbVJJLeyDZ0FdJxDsmfa--6nxscYJRSSN821SIT1OMLonFIbaFXCSzkezwYpIVBmYm6wxmkRAhnQbKmjMSQIKMvVGXdmi4s4Sw_8ciniTEVj2DYu9q_9Evaajc_tBPeZYqKiHawpGYKizs1qVm3Oy66CqVyEKfyu_C3vMpgvVhGDZU0iLpJQCl5rixQ8Ab5TmDoLJFjXVwh6kfG8k41W_81b4GXfeZxOQ-nWuUWKM-1yZMxYK4lr2UmnJYduaOJNcXcnXE-EO51hyTBSe5R-_lcABIga0bt-lpJoXMrBiPv5KRml5oIJnmwlCz5kYIhA05x-V7Z2b-1gsDry9ONrjMFb5L7-sqHp2qh6xEzpekILmNOYtBqa6hi2iBuadGKJRgaqbDOBeCmh6ZqJJrS2leKov2FHJc2TpQ3uVNipXTadDEh9ImdSI6YjFjVCZhkyu90OYzXTKS-oBQQcnFHa9rOpgMJYmJQ0FWjvwoQwGJ0rCpnWvfeKUco6b9xXBWeR1bhMwsQwyd39Z9Isyo12w8iw4w5oEfxrr6xJcDvwCkP6dyE8-0YHT7dIcDwyQDYdlhmz5gU8vWJiREPwvjBYEVAM--LuNbH5drUOczp1BaX1WtWt0RmmYNuL6SztEONqyxyvTaArS730hmF4kvnuDYY-iGW_wFcvSAMZwTJUBhYG2oEFmldhKMKlsOiOgeZNl4yn6xpbsBuCmBiTPTTqUZoGCYOjgF4HjLFzW9u2apfrSUNk0P4C6cM5IsbtfkJ8I3cfVWaqpLxTfYog2nW_iM7ptTWe9Uja3qE6FWh8JYBDF9iDiWKi_kx1NVox8SwjoCgcd1kmpd8z-lM_1GY3G-mU-_j6vpJiL_-t_uUZcGtEL_yjorVvlhtWkZJrzoMebbZ6B3LNMTXdFrf_3O8nAs2qoztNrYMHoJF8RjXRZ2ofV-CBvmwvDjaoPiV6aILWwlHEKvlUXPlKEKihP9ELlGPfOBkMMyUC0isLTHtXuEMx8Y36nQw9-vCaaQTj9TfQXk7nz1O-hIO-BKPc-wi1s3T6b5mHQGDQu-0PsTYo5MAwEYoQmyMEKG5G2TKn8qsbU_qb9fegHPyqk2oLtUJvNBjQM-dt5u2hRWHX-MsaGvud8EpbsE4KLrxs3XMx3gWsEw7zSACxNGeXjiLn09XCGslbnGma1HYbM3YbsO_a5FSj8EzgAAYYuznqqlbgLN26VMmar1hfB4HUYvSjOW6sYsSIY7FL8Wk3rKoKKrg1xC7RxqY8H8mKfFRPVz_d7FdmBYvA-fKua0f4L9XoFnPf91h-L2nBL2-0vhx63rSTRZUlmqHmumNRYOHQN4ofG-QNX7u62EriJ74ZrrC2i8JKu7gdYK0GRjxhjilNMp3tcDeD_1pCVEvepJD0rSOs1QUfz3RvDxEzDmTjYgZhwYG_QmOdLUTlj58ZiPVTz7uJ4zFpqKpEcdRy8Lld2oqsNakHpyDBUGCa_szdihyw5joca3g5mblqEporj-FxEC3VSYGO5UHtdxEd22CzgAJOmDe-nstuwyoyG3xSGav3vU8c0CGzSKxRtCfcFuMRSgbDQpOHcLv6XTcW7cIpUgrb8KoRgpvNB76wSQGALKPQk0CM9vLMdTRRtjvsyxDT55QByPrV5Oq3Tcbw-BoxowPCLrnadERLacGRvoJfgEC3CJHrFT7e3p9FzBHH3lB5qwsn3h3twLZOLZTfGWLWvh_EgzAyS7WTcIIArPqjxLh__CKHYFlIOBT-JPle3eyYPeOlZTFFDH91wbqH3En64dNDHPH586wYzY5Q86-H7y..83T3De69LdZ94fHzNW7dsIZRSHYpx2Nx1w70DR_7nfhidGRetVk5Fdt672fSnTvML6PzfIX7ClQwUUo7wa7u1RSrpYu3gAbdvGvhz3abVXD289UYVDbPhf0v5zg60S-k8cuyIYxPrP-LvPZX6Pt5Sc8ju9SGh5G9RVvUF40BIoPUxKuSU-AISsAVsGso33kqob_WgeCl4rt3r58iNAXeWCpH0iMYkkjXm7attTxKJzDb6pVlcGQnHqh4uJlHp6Cj35IT_SDgN1jaAkEmrJDjoktxx98e77joX6ti1OCWlBThdrJjXyRzeiD_Q7Hv-iP3aJATSgKKDv3jmuWpsByNylMBH3GiHGMXUSAbNYDEn8v4JBnN6vqhdC1L1lPVS8e2LQ. Figure 27: HPKE-12 JWE Compact Serialization A.10. HPKE-12-KE { "kty": "AKP", "alg": "HPKE-12-KE", "kid": "BsXA57jAXzbAJAOhd53PswMI15Hkgk4DZ5Q_FMN_E-M", "pub": "8gl3omYa2xs2taMSZ7wKMRm1AZVTxfgNoLQnCoEX83tgYOtAG8hxDHxSXrcjDvYbcciEXIaEFDOebVZ22raDEttnFBYYkGHO49Vx1eS2u-HPn_uC0kaVzkiUBKOF13wLr_qtVaIJWGCYO4Kr88pg6_e2JGVCuplK_5s-HAKYQscucJwJmKg9ImAYNflPhhtXs2NH3QqkAVIPHxBYr5GjVhVFjeazH6wIKhu17btHecdwuXSi8xYM3pKuI2SsSaJt74ie_Ic8zHROgSkgUhFdV6B-XwKuMuCUoFMjxVdsKFcdfdvBa1tzbMS4XUec8FSbQ5am0JRvYlR4MbiXv0dO6lumQgZBw0yBYBmni7FrNPMoBexobbF9i1MdIVOI6LpK_2QjD7l4HseO-RIhuKPG41mWPcmwEBQxR3FjY1uZLMiH_cVGVGxcD3Iye3AUlaNDTIU6HjQU-gFVgPVOpPSp7jw26TY-o-BldOVu6cRSgnYLROdZrWE0x-MPwJJ4UDpWu_CvjNs2TVxbSMoXeGmyWDqq18YCTPcRQjUGGgpahhgjh5d7iTNIoeh4TDAJB3cP38pW6VJerfDKT8d14asQ8mlbgal-kLMVpLqF5jS_p4pd8Yaas4iNWaGKIImtGfPFpFyuqPJLMDGNHRyGZHJTZ3RdjksC7ONQ6kp-A_JozJTAwdUzVWiLbnTFdhqSlWKcI_k2HFN_2qWlNHYPM0x5LSVuxrwxBQJ7x7EwfWLKvdAazFM6flc6oWS_wIR_f5oh1RzKSMyZtikHNTvHJUFb8JVVa7hg8WeCaaCbJpvOd4UwAuXOjrN_fsjGbqbC4GBXmzyy5eUecHRNIMO7JAeDXHExoiSE9RRKzeFUT9YIbAAJMoUeBfk7ixAgKMWsLsm-63hUlcNsL4qWJalLETYvQoGjj-AnFUIybPgo8WW7C4wDkDhq1pwLFuFCySJniIRXrUR8HYtcJKRXVgJfxsgzuIcNemWQtcanaUSpq0tYlLS4TcMRcSAPtyZlTvqCqgI5E8CSIcYIKBxA1YSMeCc2htEGt2AQ1hYGE6RkSqxNQ0Sg5Dc2sVZW2MKvCTc82OcJphiBTEFHUswKCOpWTCaS16CYS9UHn-c5vRJGmlLNyWVWdme0qLgE6NoxbayMwwtgOICHFkESrDTE0TlpnhEbN9UZhFhQMpIRtmqWddigBtpJFQKKmcXHospN12apeJVLPFdKYBA7YXOZibStuhVljIwF2aYlAHpTLGuqkBsWuDMMj8FDgSVi6BQr-9fMtkOXvncbR1Vi68NEmoRWt-YKnjs1JEw8QVwC6WCDygqZKlG_tOSFAgljsLkf-WZZ-JN8nRGDXPmzLcTLmxS8hZaXkqcSHVJij6bCVoK9olcSccac83YZd7E1SexjwWzLR1pTzjVZZ_rPK8I4asZxWEGIHAXMtjJlEGWA8UV7tBdK0tc84DDA52kRhUUBmcjAU3uU1csQMTlr3zwccyMfmqsCtNoGESG-zQRRi1zAuDpnofGnpqjG_piD8WC85ykco_JqzJMK1KFR90dYThmf1HFwEDtfvDNPSyLOiSd4dwRw0hUB0XHHLGNwKkcocyI7pBIBl0xJO8RjuQuxacYyh3ND1BJP4mQQwnqt9PYomxOhs_OK_HIVwZssf2eKEHvJk5Am10O_N4KbsoebXAZg34tK6NSaKWvFAbkSkWmuYWm1fnp1bBM1Qxs94rETZnXMlVRho9IIQbIPvpFTQ1QXvbzPFDs4JCZKY0F32IC7f1O8oqvBmAgjtNqaLRFs6dHKzOJDsDTLjQMMmOYTUYI4HHBV_vRI3GZY3EcWxAWn8wcLY3hBNPshkGrJBIfIR-ZgvLwq1kFj3YEKUdIPGoXGm_RoFYO0jWtFe9KM_8Y3IZxA0WU0WRhhv1azGGMnnkqZLxNJFcWZfsMVQcKdiflYXld2Alp971bK5zMTyKSJGEanfvLPKmkDWXlyiWnF07TAfks5fBXNnxCb00uT4wKWZ8vBtce0DkE_b8dYLMlbqSCae4Yb3HkE0kCwnqPMKHNzK2C0QjuaBAWAyxotOTs3bdgV5f8oTOwaRHkaCZqKw2Z8mtME_n9odztcVrqHyDHY26wUSZDVWbrpymabfcph3uMuDUWSRPnaNi2FtfPrTdhRfwZ4vSFA40wNAzC_ozZn8x70Negu4AGZSOXcx_1lBDH8tYyzuvwskNfttxTlG8dZAwzE", "priv": "0P1ur4tTdzfRWIfl8Y85Wlv5FC3byzBUzEuqMuXjdh8" } Figure 28: HPKE-12-KE Private JWK { "protected": "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", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "iv": "3bhqLXggqXRBDCVq", "ciphertext": "N7IautxehldwvlAgWG3RQVZx42vpt34VbBgboBRwXl-v9H4dPha-NbItvkWeaa5H-FbRyk27Fk8IbZpbYlu58eTS6TmFKA748L4rzdzcdWTR4FO_zWCOJAVDq_sWOh0ns-fTWMci0vcA9vJXyDSWd1XTyD3iVWW1RuMIJFZ9AAnVtSGEoZPWg5OBroFNKjuWXAMzJ2kwntaKpkE7WamTg-An3BKbJ200rLXvuhsMF6mh1guyvWFnuSzGaXt3D11PA66mRycuASPiI0m7kBJvIyXaHvkvQyI8kSc5Hli_oCQP8t3hlFUz0s-g8R54qkkMM8CG7y9p129DCvB2adx85nCmQNLa7YHYQ_QAbffBWu4R", "tag": "mHnowjgWKTTTKyc7HgcK4g", "encrypted_key": "D32Uhx5SCPOA3TvtLy30PNsium52O4DcgAVFfV6LLkcRxSGJY4p4XlsQgrUpRSj8" } Figure 29: HPKE-12-KE Flattened JWE JSON Serialization 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.49MMArVj91AvUzgI9mBNuJWkExGCRCagTGI0eURyhM0UHWb-30YYdtZPWDr-nc0C.Ptyo1FSG1A4a6Uu5.-MvYteyKVKdbHlG3tKjeiTOl3e3t5wxT8kq5_tdYcch3RsSl5YJhnTVLeyFGPsj7a2q3LE0bhVZFUkTJznAUmmUecLaeoHRj4FrQ2TPE2ccwzBF01fTNIcfxtoP3mOvgvY423ID1NA2BNEhQwGNwTHfwyPTxA7_eZLdmIx2U4isg48oZxR7PAvl1U9l2t30SDeaazeexVP_ec6qssJ9D-40SK7ozvr5MfKLF2bHxTjFBnglJZw0HFyHAQJcjmwc4AKsUnPFWATBckTkn_tUSRmFkkBXoTJ5VBbZdvGGTVqc27PZronArRGjjTstsfPr14oiKuTh4XntPbPteEg9MKOXkesL1ZUi-rMWv_8BTAn4-.r_411Yemx9Y7KIXxIhVvyw Figure 30: HPKE-12-KE JWE Compact Serialization A.11. HPKE-13 Skokan & Campbell Expires 12 August 2026 [Page 21] Internet-Draft JOSE HPKE PQ February 2026 { "kty": "AKP", "alg": "HPKE-13", "kid": "4xifOIawsHO0-c6lM_fIgh0hmcKUGV0ohj0aw8BQrA4", "pub": "XCYFhAuieqBanCe6DZR7Rbdl2kST_-vGeTIobXcQuFAwaHiqlFuwf_BS2CAbcfe_j2pZO2JMNnaCpHU618FiPlu6jRsmYUy4m7aIB_xblaShNpuzO4eL16ZSh5KtILqNB9AbAVAuLOtigWGbQ7UeBuG8idyjXROjWpgHXrplOqmCyqQInfuMHESRsGU7_wN5pFRA8LpA01dPTjJffQGwnvND6VZfN1MuVMc1-cA2c8KYoaSDFtWhitVAestW-CGIL1G2xBKT1SK0CltxTRRR_UgrpUcvm3c0W6U4Y9QTRIZbncdhD3kdiYXNwwEXEstlvdYuSjcnwlIEhZFsLNCuH_G-a1aBmfyeUoHCKlYxHxsmf7sJvXYLyQEfzhfLA8lyqZWEXRNOshTNMrC7NimiHNIK-zF9vyqFTsE8Q4a0HKIjTvdMNXaoKgpqxgUDqTQk3HUS7oIYJOVN0qSeXqeaZnweAfy972CSOfVkTEk2BZQxzBFJRDGabMIuztggAbElcLEZVbMue_OvdOCj18w3BYI-PHs4zUU3R6NK21jGiJGIWYNyxui36KOqcvceGiG3X9V_zfUIrUtvdEsQ2_JKQvZcw8Rtw2JTnVQPKhpFsDZkzwhkaHOgdWnJPqSA8CmK0ZJnkXyS2CWYBiy9LQm018sn6hm5rLslIos4SHudeZBnOpdwkteQghFkx2Ic59Zmggw1mvJyYCyDUCMXYRVkXZGPrIe-CcAiUPQV_nmJjLwBwOdfh1rPF2KOsrcid3Zv06IuvJS5R8Oj37QfAKq_LtUjOTebm6Vr21VRzsJ0B3gN2wwei1MjM8VIS0yKMwtW1qg0vaoswSKpHvtYeqQt80CGK9yYx1R5X7Nih3sGQABMo_Gd_qu4m6XOI1QZUWmRQ7RcjzMDFvQVx-hxrtfFRRgqg3pyybnJkjlGhjyeChFGtBk15wskdGRu5Aql0WYnEcRhdsJnMcugA5nDGkSOEDQh8hmjCrqWLySwuzjBBlMNrfELTQSg3ZKMMDDBCfkKIBJzKNqOSch9FIoAubQBFqgthzpbLYafp9Y4IOvObpS-WkkyaVKy4YW4zuk49aQkkbeW4ZMlwCuhhHOga9VriKs1BWIfk0ukrECDWGWisstZTdW50LlTUlZZcvKgjfRTeUmuptsQWBtTDKaP3tFzq2wNjAQJpkuKcamIbLeKfXKCyvNrDgggfQggBNFCUgYXeIjL6KUbDbIIE3qtHZB_JwNMCogKzxi7rwsXZ-wQZGG7iNweL1rORhK8UUrFJ5uXKowHZNpwI6prZknPHOmEuJO0lXOnoDs5SKxzJHQ1kPCExymAClBeO6KPlTK0x8AWXos4wWeL3JoJjvNbhAMuzip9GTofQAfIGQIENfZ7D2WYAOa4tLwFHeAn1mTLRgVcD5QRGJdU-epS2gGhvdwcbhc5LjtXXVdWeWR6YuSw7ZGdwdSLHitYGLkJwMhZNCt4muDH94rLfnhYoXPOFzyrYeKRjdFCIhAj1aZsxTBYEpqTv8jDQcFdNTNGiazOB4c2G4G7IbdK92mYdrtwMGpW3YmPLYJKNhoIVhPKrQN0BYjJUPkDJlVPKZo9cWPAhVOCXbu8QkF85LkcR-wIfuClBzlWVWK8MBsB-DaBJkQgaNVQ2UqtQhw31rB41JMMZYQQUsyCl7lhVYu5eSd_x4qTEjl7TCu6xGkqXlAPZWUO8XeeuThSR4MqwFwqhYuQ35GPSVaI3bhvlfE1U_c7kmANl4ywPdUQVUOmOHt4abikK1GOKLurRHoZpRLCzsDJifRt5jJkBUiTpxkX7iY6-HV7J1DB2qCe5buiq1BixnqRFwmOx8ch1XZbmrZZc6iOP3GVqfW5jAxHCNrC-LYDfGg774uBzsIfyHdv8rUFmpQExcRYiQgnIdxsFAdkbkeucYKo2tgXyppUjYhe7ByjOmDOStyOVWPL_0cV9dRHSnhLRNJixaefp-AuyKBHzvmEvmNb5DeW39pIFTID6VpwQDBrFPyalvJXkhiQ1xkyfGEHXkNFAdpEbTNT0GC_K7BpYZWisXF-CPBYUNti0acN-izfVBRxV7TVEOCly9H9rzUWBn0EL_Alcz4-0u16W3ufnpD1NNsYaGu5ZyGCabEGaoAgPS8izvrwqFC-2kcS05W7Am6Rx4uMxZTjx3j2QG6KLkkw3SSbaOsfVABOlArIplM1Jv7ajoAFSPCKfhOKtOmSYljF", "priv": "P8toumlkmiSZKU6UB6tJC0jx1pEqf2kpiawqW6x4Zsw" } Figure 31: HPKE-13 Private JWK { "protected": "eyJhbGciOiJIUEtFLTEzIiwia2lkIjoiNHhpZk9JYXdzSE8wLWM2bE1fZklnaDBobWNLVUdWMG9oajBhdzhCUXJBNCJ9", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "encrypted_key": "25ZgeYG8Yoyk4S7wykXmZYjAqNOxNWdqof4-kvdFo36W-8amyT11xCgBNQUxBFBI1ymkq5mTRzdeLoX2ONXjpLQngbxelhiccKeKbuAsUlR7zp_MO8fZIwRSDZTjtny0S_yURmLFWnPpdebCb2KJpMN3jn9ePdmPLzrrtW781kqYZ4CIRlAjT9ilcsuz1tQJLouCN4zjCStAMSWdnhxITe8zKU4iya1OlcniQfcyyHDpnmLf3TLEeczWeqj5sCihqh_TnxtG537JVQWkjbTCUBNbHXQb2RSC3t2pPO7rPr-a0GNUV4zTLyCc0TdpUXuMEI6zEAeYq8CcbGddOxToXSWzgByQLrY754Zm2z4xhvTvQ7UwbGYoMVrmW3LtRO10qX0bLfjXswexIDtaEhKyW0WoT0NYLylwPHoiUcDrT_AyjieS7eil9kK00kPxL1sOv3NT297iChR3J620JZpU-0pEfaQBASDQ1c_xjAvQwwBU2f7HVvc1Vdw0AXvOFwcAaZopO2Pullsi31kKuiQH8KaATrZaUlL_Cf2HUq9FHbUrSOkvG6Be66Lwa2bNERWcFiBF2x0S_i754DNW7d09Lf1ppe4rRSG_CdGmyM356-uc30828eUvrTeNvJNqLPADEzPyXRSP7hC3XTY2vKtMBc-iJmS8pjC0z8_bkL7umzpsU_HFwP9vBxSlr6ytx3kDdqz2rcxVDzptMg3P99hZ1DdxtNUv34ciLyZv_QCJkht1kfMVSzQgDzag06sYcHsWbBsOK4vTuBhfWM85cPzYK8edEqMwVuElGyqPmReTNOwzgMCVPPZ_b4jlgQvaTm7Ll6aDxGu_V4D7poFerWnKrxm9TexWen8LeujCss1HAZtTny2vHg1koEqEQRKPakWO2zkYjxqzkQOO6XnrYSd-QWKeGAy3be3yu_7OW40aszrD0ekcX6YNL5PVCpSmO_wTR3QBgBA-RMo3psfJmdZ9pJ0GkAKQrX4BsjRDPC6zbsW4JI3rE9ZXIETy5iI8qBjS2eIfmDeF-12ZjB8m0S0U6_WrSyO204S7yDCc2J5_TUobuyTZAd2fbxd2idCBFpCLQ32Lg01wbjlZsrP7vlCkXH22T9pDoO3dtDDcj9QiK2LR0-itQZiNWkFiU47817a_VLBRWhJVhIGVy3kRWdz0Na55eo1qRprNMU4sX-aFYnrCb7np69MikLCJZPxAEkw6yhx__yg3dXPdD_I_vYTtyQMPKSHNKDLIQhZWh-oBvUySlcpoctA1MzcSZCAUXcyGYC9KWEzjvbO3L4PrkJoN3A7wYHVWMP3TCi10u_xtob3_B8IqsxzcoUhTriAl6A7MK5lQdvqK99I49bQCEygOTTw8SIVVMef-5Cy3EREcJ3aV1RLnRi9TqP4_fi_XsU8EKnHoyD_HBCW5HIpa0hRFsHFpP3_hFFmJ-EWgamgwnyKqN_fIezZUFqcO-lpYxe5559WUr4FSHYlMUVz0gKyW9bKDzlwCZW3bjzm8RCf2jyWFHKilRlYt_WCCr_iFmiLWXGCYEVaL_qIOMX837FUVBOY6M__8gX2Uq9aAlxr9bjwTliJ8LTIdd41UQ-m9h1pZ6lOIE5nnDD_Jjj48REbWbGAE_-QryQVlU1oFitYxET2WxszMVivrWWjhQ2hraj1AV7U-A0bE2XA9yLoGROOeWkjoUqAW7jVhlBp_pViqkuYEwHrxwMME5w43CYOnmH4GIOHfbnsf5xzRVg9HMUQu95kGwSegWuCnI5jhKy5fIAukFTQjA0sCrJ9esZDH6hQW5MCQeS6TX56waGpNcvMSazrNKMEw8HTWcl8s8tmi82DOga93FxDicAMn5C1E4D6wJKr5V9zTk1_qE4FWDvt-fvzP3eJNWwsTya_hGGtJNazyT58NVYlAJauhqDCuI6wqwv4imX7Vo5Jdn57ibZmd1eGdr189NU9LkkhVanfMeFo_w_adNVumvUnrvYdKlO7IAr5DSDlaWOIisZvkYu3SHDed54OhpsLp8lAqJZVng0w2mFxm_kUZNW0YDkQ5CU1_7WG7FV-1nGf-hsUekkLPwa5pyLZCIkGnZHpw7imSS_oEyvyuaDg3NF2tYvrw6CM5NQXzOXzzH0ax8mRGPf5ur1Z4YtzyqGT8xooomfUbDlFIawi2sWQYd7mwa9zIbcz30HWNhEsERaM5clYfUT-DAlrqQ4Tt3vjhBzHfN6TFtOQ9", "ciphertext": "evHuU7AbtmLiCvhITweAJmsUr79rAD1ylsnw64hiANTM1qh39GbvzqJepSPXn7pAb2cNe0wiVwvMlP4Td_Yd_VzRgdpg57Utwt6haKKeKGHU6iBEwpl_JQS_bOyc7thJTUORXdPj1Mny83KE8xmXMJ_M5qyeHlH_usF-afPKLrj7OWcXQ9p2irz_DNEPBCDqnxnJmb8WsChkWu_ABPGZ79vzQbUJzXvvTxbfZqc5QGkqb59qygphsvzgKFCfguIsuz29gSyehOXz3poMrB1nffl53MWoGuG8ijYS6XpGqu0ULqaIR1NHXImCbKITVY8fXe-JvwK6nUx1jK44q9EqTuLmsjHoOpUGRIDwJSgyH4SaXpmjdgsEqZVtZKtVfiUYhQ" } Figure 32: HPKE-13 Flattened JWE JSON Serialization eyJhbGciOiJIUEtFLTEzIiwia2lkIjoiNHhpZk9JYXdzSE8wLWM2bE1fZklnaDBobWNLVUdWMG9oajBhdzhCUXJBNCJ9.l6iJ90Oc2GkCzuM-p4hYiVeZsiyvOiE-gG8ACFGhre0EUNxvpcKtCbGbO2Wt8U3xy9E75FblWp02_9-W4DnWJyAbRimwF2IeVkxaqFZ5TDKM1dSoUhdzaZO81DQLdOn9esI6yLNzx7akNNY3LSdIhB8tD4GNaHB4uUAmRcR5u2ffbWCeY0yB_Cdoh4UG3hDsHcnbe3TPHMyLJXpkhpZuMTSiMyWvbWV6mzG6sZo-G4Pu59-bSNurhGz3ad-XKZATJUtedj0YriUNHHdycpxOcgvqQEnTaZJ3CjsNuP4NOKCWRJnXuBiv6b0ZAvPSsJ--gNugEZiBwi8-eA6uNkxuxEjPfutqfw3ElB66iOmLumoW2XQiN2VgJBisAeDO2sfSCU19LiXMTOpjdARL8qNOWjrjKlOZd1zuuqSB_CJnqwepZ9uCgl9P6uBta7SsbWfI7JK8gsGPKu-bpZBk-JK6sFSYcTRRViYWXPj_UHuxXmqpSRA8PuXMn9wURV-dC2fes-POFMgYYBaJJV5pV3yOvUt5aeH13isGHxYJhKhoGxYUx8quxjqxeUCV3CuhSyp2uMP9D90BTffABsyROQeeWEjlKsxvMI82vumeY8kKl7Koy77-7JwJiAUJNvu4vMnTI2FPVNOCKnoL4I0MsJrcZTkGksY9ELe2fMt0BnQezDjS0YldoMsbcHiJvhwyaAqySkDbAe5V5sIx7WLb_Aj9V8XCkyqf0Fqd5v6cK0IVeNXU3Ed1VWicMx6m8yT1oE81mP8ca-hdv9td237QbZR77ZubhipBkgeUh0cVzVUSATGiReXhPRbiP0dSEzsaOFTzCSDirN_l43JZOc6PXLTJoS36-JODptyfUqZIrMuhswbahlu2GVF1Qvcd_3Xr47GLs3J0-eyqjv6XB2ABrjk7CHBblLAIsz3XxioaSvaEoLrweTE5aQ1NL_PWVWi3rXnh5uai05CfPqHq-Y2QgHw_ne0xwMNeeH92SLaH8zFH3u46uJVYzBy_YI9Z1vdo7CmTgvA7dGXIdwAQ2GqvjitHno2RhyicPCExpigQctf2nWpNMuoKUyHNS69qSG4s2wthxJoUHwR5JaWX5oRUPu-rLTIF4GqecWfpPXS00YUZWC9Z4_Q5_P1iTofELSWKk89ym-_qnQNTMlE3VQFrBvRj1GMDQWK7JCYWoGeN3ECnl8kp4wz_nqgSs30naA-LpyXBAFyXxvC3kLsupG2HenYs-pwZFxwcSyt38C5pqxJ6ZaZLHZ5GUpt4Qybx1MfkBcHg3dKy1bLafCouFZ75yumyFX9TrNgfcZVGRey3q86Xnyzd_1dTIXL_l2ZoJA2B14SEm2sTn9m-6Yy-NQjUa_ItCYYMlOQ02fAGPfGIrEWxysWLfqe1k_m-YyvSOvdyk8UNrlknUhOclbvPsQ2Hznq3ugavzB38z5NsJHNkAjls3Tbwo8x6jSRah4pYb0KXMP9Mbyz6cMJ_zFqj4R7FsHAf5Hh2sYq2fs6xmCKKy-6N4DebT2R8qPaRzbZjSyFGibSzBjUwT3w4DRryeC5byV0aEbb-AD1hKwpHJtFr5wi_gvr-FOYrpQ5o8i07rFHxobj505CMCECMdblWCY4sJ1QA67qTQLkqoneibjO-TfVt4_nD2N0Ip1ZHZCmb7D1jkL3Z5GUVVS2HA-MUO07PZ3snPCaJZnPGnCs5EoV1reuPAaHxiGbJFKoaM1pdEOkI8HjyPLC7hbZcCwaCpgkjYo_M8PTIBER629MMbSOVkLBS2R9DJktEbilwu2qTOSKH8jTg2teZ7NvVRe5TLIAbuYfgR2KA1pTV5s3ASfYZtxjAzr0gLI1nPJ2e88VatocmoqBxpuRHFsczBdxcQcv_Fx2AEh-I9jz79uktnRWHNdP9hXcgIYThKcUbxwsTxSCtCwG-3rgedypqdi4dHCZ7UAZPqeVveBu9asXfCqqmuKbRjfF7dOrguagKUa0gEN7rMuctdcjDIAXB4ryFmj9mfFveMOmxNV72gpOZ1jjaJB3Xbe7xdhVKOKe1vwc2GpL_sMgE59XjAKfsf5gs0MecOK-IcTwNf6SEYld27kvlR1M6QYsEQUdl_biL7d_OmMOeaaYxCLPTg2IL2XBscw5Bwd76mNlhPhVf0Bz1tA0ZMjyDBENBwyVC4Y1ihy5GerWHQTslWySwQqC2VM6Y6Z8IRlZbF6-H8Dz7Vnloa2Y6FQ0oifQW..P-shvFCzgdVVW5l0keplsRfMfXRY-YmYkpg336M8xK9GtgTo91-uLrLcqrenl85JkkyBOr4jY61LueJGqZeC1fKUbviUI_rl-X3U9Jv1qbGoVW_5_Qnwlh6kZfrTzYSq1o3TuAgjODrjL1HYLfwzpE7JRt-Tjtg_RCsOpT5z1Byh35Ypu-plhu95F957aKSWN9DEHUF1bcA1j3VHsa31xqaYLBVr3-d4CQwtHgzQzuwyIbnKGKVgznAQkQ-065xvSkxhdCxY81AY_D9mDJ7BwPt6guBF8Pngjrla2_wjuKsqcVrfOo_frNRntuC096SbzShXCZe5giiM-vSpi7My3i2odjprl-n10G6QYEg_jrrWPFWD9-cI8HhF6WL0E6vvIQ. Figure 33: HPKE-13 JWE Compact Serialization A.12. HPKE-13-KE { "kty": "AKP", "alg": "HPKE-13-KE", "kid": "0BrDfMl9Ou81OD27zcoCEKWuQVbsviuJAEr-9IJNTTk", "pub": "lIeR2RU7WtrK4pOlWdXISQq4tPy37ZkqmoGkTWGlIseElHjFabGZ9KecMDeHTMpSNESRf3Kn5zeq39NCJWyBnMBWIsGc2eaiN1RAzuml3AIG3_mu_BSwNAWpURZPMwBOCLVaGeerd9UU7Ux6W4UUSNxmFBQlBdB_uplDO6of9ihkBEOpbDSpXHoEblTCx-dVEEXDN7CkDLcSt6KKZ5BI5bfLHNdR66teXmqvAuaG3iLMAuepAhRQw6XCgiVrG8MZDmSMzlRKXnSdUomIk9J8Lch5o3M0iQJXnXqYODg7sKFLRzQjU1mtneTIPRujvPlwBbWqxeJP2FqPfoO3egjAVxpCCnjNYWUgw6EweuKk3YcjGcOTZZaZKdmDONkQLjfBSRZzIvk28SOfBeJWkPo5fJCU_pmjqRkMUJWiKEec0keTq3eMYeGKnOgqVvkgO9ObWzCsoQtdx9bI4eBBhVIP8vStWQIRkzbG9IOfnZRB3yCeVyKVLDO0gFyACEGncxBREzaCH2qTnpGAi8OOwaAflXGo9FCcbYOYsLBmNCYrrGw2R8ga8fZeBzdE9DSgHvaFU8m4Whq8WOMhOJiE7hivcjybR0OL0idcwhpt8wUs7GC-ESNWd0ti3wS0bTk3_WMStDwKQxnCZXxYLdPEXUe4gepUu5cXTxua_tBkXNmestLHWZqm4qsEFCCHjDoShQoI8RNoZ9Eaz1o_JegtucAZu-sLNUcPRyVSVatCBXexIBqVExA-oxWCV0ZQYsE7PxyCG3hpzihX69IktQSlcIAldnORc9A61CMwLhS17NwTJOHK7IvEtyJQTrlC0iJ0oxghDsS_HLseGdLIaUOh4uNJfKybZsyWquaS6LMXFSI1ASEiZQROTMAEx4gfIDCZuitoCRhpl2Rr4pacNExhqzAOU4keQnaYzskTJ3wGGwIcXEivpHCM1yqHDMeI7RRUYHe6-Vp3NlxIz-W769Slh6wi8pxF4zS4L-KmMJMz6EmXjAq-hCBVo0iUMma7vqhK39VJDdoxvvGRRUEfudVl96GAiAi8dwm1icqyXaMPhZE__4WqN3oSBZONeCw5C0K5fnjOeDLFYBxxkBt25vjNPtFxCwewtjG1-VjIRiPJCalWZpS6BnaBqyUD8jgMYZsHhEVOeNyk0wynv2iNisyNt6E8d7pbF_sxVdzDSbh2w1Fyz-PAjVULffcYIRohQCw1J4mYfXJc03eF3YFT2wMsHJgvOAwFUvYzXIZ0-pldQeorn3ioU1t_lLM7P0F32mW_pGpVZMHATklxjqcG6otoRLZENzMKzTHMZhBp8PBTZBo4UbtoMqscL4SJJ5lNCUQHC-AVP2uNc9elnAsRRYnHp7erXcttvlNlIVYLRNNYa-e_O1i_rAdDQuyQ5mwdxiauMCwM2TYMqlS42-aHgXQID-EZxGSSgHul_6BBLdN0LKtMQyeITzfNypZb28BbBeZ_0Figr0FMVVhKOktdgeS1-LgTTyaHUiSkU8PO8Hga1Pt_fSE52vFpX0tPjUKY7nkU4sbFheRjq2JQYCM-TIBQyVwrCCjDpusKY8mY46qRxXVsriGuRVYT5ldZ9JJ7snePgxLKivqGxSC3Ilw9PmHI1gJ8Fmdu4VEf4wgrOQQuEIVYVQk4UFkZX3wJevrLTUxprpVcamxFazG-gbeBlYOS24FgLYg5VZCk19iVMnqvZMML7gyc0UYZrlvCZnpCcVzNdYmPx_q3WpZVAycduim_Y4wQztgZVwx1tAxNsnw4h9cjheAw7pWnsHeh8TSh4JMFVDM4HTWLJJNuAEUq3XJMfjkKWqevzpmT3ut6rWua6Osw1PNdEcB3OjoLDpsmzTuPWxRY94POXfsSwFO94orDGIAo-px4J7I79qFUk7l0NzFHUtxhr-VvTGAPOxE3uSEOmQKNR9irzleuiLh82xxzp5QDKfQ3BGqFvcISj7fOZvYtufiKF-hFnZUeJxO3JknHu9cLPqBT8HV_ANUtkdUAjVIjwjkOPbNAViusbPq1fhCApMsF7YRp9dteJllx2LIKR_ZQ8fJ8z4MhCyPl_S6Bd9SOZz585v9bd6oo-B3bD1NTj9kEEkc2OVuDC3U5PxksCawjJjD3ijBJBc6EO7zOZ0DnP5PBkNMIVJkT60gJBtH5r-Py6IWmUh2bILE_R7e-rKEbdJzm2c4YsiYYOQsfbhFkniTdp9fOBRlTAlmZAPnzcq6H", "priv": "ab0bJL7Uw-bWrw3usR85Camu8riwNWawtW1XdVREAjA" } Figure 34: HPKE-13-KE Private JWK { "protected": "eyJhbGciOiJIUEtFLTEzLUtFIiwia2lkIjoiMEJyRGZNbDlPdTgxT0QyN3pjb0NFS1d1UVZic3ZpdUpBRXItOUlKTlRUayIsImVuYyI6IkEyNTZHQ00iLCJlayI6InJ4S0hmRkNxQVpzWGdzVnhGc3dRS09WeUY5SWo1anJZWGdMUVNSTXRfYjlsWTZKRTF6cGhqdWZpTlFXUmYwalBwcmN3eGZjbW5Mc3dqUG55S01DaWtzNmlBeDU1UWJaOThvd1Q3bHpzdDhNNnMwVm9kYnctLVBhVW1pRXI1WDhSZU13S3k4aUJrZi1fUHg2dEZ6clF5T1R0R0VOdENaUmlyRUMwXzlDeHgwWVJJbFpqek41T2h1UGtmNDF3WEQxM2RGN0lpS0VTb2FDTkhPcUFFSG1pVlVVanZZZnkxVkpGV1k2bkllemVISXVHTE9VbGZvNVZBU0M2TWxVU2V5R09meGdycmwzeDNBSWFpMUotaUV0ZENGSFlOVHNKWVBLdEFtN2FDQ0R3YTZYZkZwSmZNR2JwRndsbEFOYWJaTXBxcjhiVEhQaTZDU3VncDNGNHRyYkxvVXFpeTBDcTBoTThPaGNFMW9CTjZwdk5zV05ScnRxMzFLSkxHYVM4ZHhrNGVqTkZ0YklYQ1FsN1NrX25TaDhMeFViMTdrM2d5UVQxQ3VWT0lUSW0wNXg2emUzdkhqbmVjaWVtX1Z3ZVFzYlB3TXhhcXdJMlNKaExxdUhqbHFyQnZ0QWFwMGdLaGtZUGdOYkR5MzJRV1dyMnJBcnRESFdiUk9SaWJNRHplMnNraDNTNWFYcUhGbXNIMDhHN0dNWk1EY2VhVW5Ic2RyN2g0OUFUU0R5cEF5Mm5CUVY3UDJhVDdVTDVONFBJWllJS241Y19TaGRYYTg3Q0FXNGlkYkNHZTNUdGoyY1NDb1ZhaDVFSXM5Q25ULXRab3pMam56RHN6THNHVlQ0Rjc3X29ib2I2LTg3bWtsbDlTcUpGZkI1elNxR1FqRU8wRm1mYVJVeklPUjdmU3lRLXgxaHpFQkdKdEtCVUdwbVZLUG9sc3lMeDJNZXpaNVZqVEhWMGRfcXdrdkpXbEVnVGk5UHRuZ2k4ZUk5TjRaakUxYmtud2xocXVkUnFST2lrejd3VUw3dTllZ1VhQ3JXcDV6RVVlR1ZZaDV6MzdIRi14RFduV3VRLTd3ZHNFdFhqeTZOSTBYdzlQWDA4djAtN1ItOWFGZE9KNzNZNDk0YlNpWlItVkUyT3g5OXZ5TXlHLXJWOVV6bzI1V211WmxOcmJoZmNjUklpRERkcHlYbE1vMG40QW13RVN1azdVTTQwMG8wQTZBcHhDMTFGa2J4b09JRUp5WFA4OFg1a3lxNzdtZzc0VDhRbW5aVXZCRGkxczB4dWRnTFMyeUdmem8wdzJMWnFuM2FVQ0Ezb2RXdGNkVENrWHZ1QjRhUHNZWFRWcERKYjFfRmFPYkFxcWswcXZLaGd0aUJ4aU1IUjZHRHZVcnpsOEZYZWVDRWFLaGd6R2xWdGJQaERUT0ZyMjNoMmZqRTA3RlBTQXJvZXFNRW5YTzBhUmppZkFuRnRJbHp4OUtZN3lyaXVyTGV0X3Z1VVQ3QlZmS1k4R1M3OGtZY3BWVUtfLVhEWHh4MU81UEhxN2FoRDZydmhENkNqMzY2dUpJMVRlTGJHMHdSbXZUU0FjNkpwTnFzdnV6bDRmLWR4T2lEZ2JjSE9ER2ktNElpMFFqeThjbjFFR1k0SWhqVF9vM1I2NGRZTDl6T2JfSm1PTlNfMTQwdEFCbXJNeTQycWxLa2xPdVg0VWZsOGpIWF9SeU0wX2R6ejIwNWZuaEhoWHFTS0Q5c0phenlrSmVOU1RncFlUTlVSSEdkTlpSS1JfUVpOSzZ4VEVXNGVRYWJHenZueWp1Umt5azRRZjJYcXJNUU5wOTE5dGV6S2doRlZpOF9zbGtoXzRvd0lHeUI2eThMTmczaktyR0JLaGRZa19fU2ZYT3dvYmpSRGVsNUVVWE9DcjlHbjNRd3psNDh4MzVtbV9DWER5YWR6WFM1Q0R5Qkp6TVM5dndscWdkNU1PWUhPdjJMZVNqM1JyUWlsbTJIeE9sN0xqa0NmRnRBeWREVUZPaFRKMzZpWHlqU25VUXpGaGdtQUczOTNRTGg0VG84RW82Szl6XzBDalE4UU5lUE9pRDdHOW5VZGpOUnNwZWZFdnZGVTROLW5CZnRxa3NmaXRRdjdyWGctZ1hHYXpqUnQxS0FjdUFvc0hIdk9FRFR2b29rbDlzSUFtRFNzcFRsOHhlREc0N2hsQlkwcjNTZU5lMFNJOWNuekdLdFJYWjhoeEZzSUNrcTdTV0x3NjRYZm8xOHNzTUpfcDBrbVZDbUJJSHA4a3NFSVZ1VjhraE1fUFhvM2FrSWxCNDFqVms4bXRkTHhyQ2pQMVhja2NpV2NoUHFBQVI5eXlwSmhlU3pwMnVfTmtweERZXzNmbmJhRGZHZkFaLWh3OEVELUdFREQza1BSeEkzYVNBbDlaTUdjQTZaWHcyZ1FSYUZ1aThPWV8wd0l4VWdfd2swTmktRE8tcTBCc3FyeHFBeGFaWVRRNlJJQk1hZUlHU3F2MU9QcGlOQmthWjdJZHBkVWl2VWZVNkctczYyWmx1V2Q1OXRJT1d4eHlNWk1kQlItcG1lamM4M0xYUzhucnZkSG94ZUprLWxvLUhjN3pXZ2daQ1VLdllFcWh1aDdBY1NSOVEtenRUbHVVU1RGQlFCMXBsTGJtMlF6Ynkta19IUmxGOGZBVXpkazQ5aDdEcS1oZjBCazhhY2ZsTDU0NGFhZXNReWV5dkJMbzgyem9GVW5nVWJIQU9ueDBrdC1MRkRGVEJMSmFJX3NkWXZQZ3p6WVBZSDlpcXA1VGlOS1FIa0VobjJHejVHcW9aZVlqYllYNTV5SXM1WWQ0bl8xcDZvSlRTTUZ1Y0NxY3k1U2YzeUtCVmxobHFXbnJIVXNyNUg0RlFyT284djFVNHU1VHhRSHd3VDJlaHJDYVpLeFAzS1V2ZGpwYk11R3BxaGZlSEx0NXk0QnY5MHlGdWE0dHd2TCJ9", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "iv": "hAt8r15Rv6ygUo9U", "ciphertext": "ZhkElOeJIgqcgJTN1QOn2MOSxeYw2b0czFHp0TxD0vj9CWQDk_pisQsQYCXiQfbE8tcZi2vNdZv82uBOkAkggjVKbwFdWs6W4etH0EaYvI_55pkppZuyhfY_P1igJaCIwfm2LhFGtBhYGCqjD67i7mqMOmq0j_x0Ofg3XMQtyVi5PqF1_90NxKEom2nUFla5K55WjxxqPCt6d4zMQFCUI-Z-dBnduOyQnKK0FIgSZQASXZhfMi2m5fJ_zFqvWwE4NEbhM3hnQczDxoCQq-E4nmkOW1Pl2v3iDYPCDnafUfqqama2mx1-8OmPKL8P6UJyYXTW3Ve_5NBykWMIiJAYis4ACnS3RV5NziUex6cPEeNo", "tag": "P4hRMm9qskdV4TT_0D-IGw", "encrypted_key": "hCtP_FodNMBRK8sZiCwueCbuPG6jIq8iegt1-Kv3dasloWfJ0lQClNdFVQQ1OeBB" } Figure 35: HPKE-13-KE Flattened JWE JSON Serialization 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.9fG45drJG0-KwSFjk94DnvCLWYyklZDNmWjQRBcA8iFBT4pp2PmI_J5ZX159F4Zj.dcZbRxnnrOtPRzin.wQA74WJBvOwjfSJoN1jqdjlztoZvhyLk60OK-kfHKOqsI1lB9QIoQReOHkyUvP8MswThMFtXU2zR6BLq197NBOydYsIhxR1CEbc-tUpJ8pqBdvpUUNL0PKwI9ztWhHDiCy8sqg0MXVPC-91KZmXvGmQ-DL2AnpnVm_XYfB4lUKm4Et70AaspwXnAF8UbasDOYPymTSmBXLjbYUjpuClI6YOfcBNuUU1GuIvl6Hs6uHVlxMKz4wNX7axdnLHWEtCatVuTWOtyPQsXASU_Ib7B1Ioiwkyh3my_iF9tyG5yF5FZjzAK0GwTlipJSIjrBikE-98GfW687XT1-6ivK1mqXIYOJ9EbcbA2FvPxk-Gsgz8Z.Xo5BSgUbW2PM37DtM5DGIg Skokan & Campbell Expires 12 August 2026 [Page 22] Internet-Draft JOSE HPKE PQ February 2026 Figure 36: HPKE-13-KE JWE Compact Serialization A.13. HPKE-14 { "kty": "AKP", "alg": "HPKE-14", "kid": "tTd2rviNEWmlDSv55i7bpOBkYgi5nYuGG44ptRhV51A", "pub": "NPoE7SUAWwcVJbAWGEAUiZUcIrAIN1UJIoR-ZjZSAvIUxKJcyhMFoeliHppZ1ncZuqqmSTCNmCM7j5XCvRRUZgqYgHgmHuCJOdMK3raAbPF_g2kkj-iRqtQJ5poXC4bIpYd7ruJcHyyf8rEytrTGOKejA7xw_9IN8VtW27ah89F-3fUGm3xidSJTgrgGHcHKPhewgnNkNprFpzqwwpUz1jlnz-mPGwAkMBlM-xiIeUlX6hqKR0xeTDGUbyt53iMUdbqi0EaRdHC63GSruEwE8NYjr-Wy1-NXPEYSU7qlLjGNeSRSxZInTarM0ulwnFTFzii7kkmygCkGDgIaeufJ7hGVvwSI_hcE5pyBMcaTDiSyH-ExcCQC3RpXsTGbvEm8uSRqCfkiucLKgKPMbmpkcRR_bqESteo-JoYrNtLDLbtifGDKnit823vKEDRpbDMpQzlNThOO-vlNh-hHIHNjCUocRqBp6HwLRTQBpkIv0ka4djEU3HVDNkEZfNAkcJK3lDQDgGdWzltRb8gBZjBrWLB4zdCxXGSjwaGwRJcHfmVTBZtCx5GAlDjBiYxhmqdS20ZnXDMTRbyh3kPFxcpNa1Ch9uBkAsLORtY2rVIdztxsmkOQ2pg6lJBM5ugPRaRCeZmUhfFFQhB9dQVQNno2R1skBHh8InJe7PNBhKu1P5Uom-p5Hll3PgVWsus4QbfG5fsykOWC1QByTCgcvewJftuc-XUtq3dBcVCNrsaOMACE60Ci55WxFtlHHpJ7qvvJMfeYkeyfGaCweFFMFOc9BbeRVaKGItC73QLPM-Fsuylr90BcXGKTMHNyIHIuSEFChzOzb4AefYuz1VZeWXwhuETOkFkPlFkVOdueGJZLvUhu9BC2bDgcETosxYlX77dbxiGjSilEI6TI-NiG5IxznwoctbxIv2kp7pUu-WdMJEiYJSCCO8io4XpqKQI6S5Zh48drHQG7NjcGhgAyGuUNWKUS9qauz_iyYihl1AAel4DL-keymseFwPk8NAuwORtPhiR671RWYNoUJvWG5pwhJBczvVCx2mgrLjZAFhaGgPJcdRY_Ymy-aQmVlWFgpkjOuaZCjKtInfJn79AMUKoLaFwj9LEaf_RYyCtlslnH1Ym2_0aIpqmGeFu4e3O4M4Yi-HAOK0kQmgUx2BS7xpfPmksEMiZ47CZMBqRqJGHK1vWlVAKbjRE3m4o0qSe2LlAUQPJvPwt3ktjA1VsyGtpROSw0-CcGUtEiHQMrOXQhIaUFebVWVnOVMnNeISpQj4gtDEkXTbUBdUqJSBZsJ3upmNqxckie-OC2c0GiflFOJjbD-rw7ORlqyaZPYqKyKUo2uEhlJYc2StwnG9J7FiJq_jLA-ROc-QLIirdxDGNxvKA8FddTCnqtxyR_y1ac9CQXL4mazTNWFLGjcmiXm1S1BSg9eYzJe_tC3FJlijSV1vpCEEljF6u8pMaRhIhGuCSPC3ifEZMzl8a8E9CkdjOug-hTWkdJzjE_vZkkBGce8vJSVelkY_mTVnO4kBqYyRmqo56COq_xTDAOFj12mqzWYsB0FfV1aXwEIThj4GHHhD8", "priv": "N_Ad_9j_QIuhusOi_mWxWKvtFWt_Wvw8f5pL7LOW6hepmK0yxo8tk72JwqMJNfKM5-xzI3CjEM_ZdotrjtKHlw" } Figure 37: HPKE-14 Private JWK { "protected": "eyJhbGciOiJIUEtFLTE0Iiwia2lkIjoidFRkMnJ2aU5FV21sRFN2NTVpN2JwT0JrWWdpNW5ZdUdHNDRwdFJoVjUxQSJ9", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "encrypted_key": "o_WkCvL36wuLHZLnwGKL7iIxcC4i0RgJbZIHoTaqDEqGdLGngTAfL-RvT36q8Dk97LjRDrA2jIKLffPbGYBp2B_vUpIY3OiIGu7YydEL5Yn6FLgkcg4R_XXpVzwLQ9z8WlDyoBEUoOCb4CHEcz6SghPybNPYkNWm3eKD786JPo2WfunxJpFjLHRLfjHkb4bHC34wmPjrbtacAJugpJNz3jHLotOCM1wH4RL6MiGrRzC8_pgTiXHQzoPIgJSS6pstFhe18U1MLtZckKFly88AmYus_m5S8MYkOmGLk6mI1fjBO2fpfTee5FVhzcD6geavYNv6Q7Jwge0lXehJQ1lvBl4aYdTib95UDlC-TLKl6mSob6dOlQjH7BMPdfA3Se_txyxfcfDSgCxnKLTmocP6zgZxcSdqsfBCbIVfjNRvQt9Ps64vQQ7c-1zEKGgKj4FMnK6vhHsfdA4QqBgQzyZPz5F8KkwYjjCOUS3N-y1FKtiQAzsGLSXWwZy15gbm1CtfVc9NNtw_iJ2u60UbexBJUJIAbQDeeIc1qeeyuzSs73sNvWG4qShb66xP70At9TSABNyCG0Wnv8aAPRXIWyI4c1aW1cTvhPm18ssMR0Q6vsxrOOdB14EuubwrqNTx4wk3x5hB0NjnZvRhHNLmloSzF3JOeBq_ToASMLQ4YTBjcrVqYQwOCoYLXwVS2VB_uwqUwgmBjCwlFvghGQAinKEDc3oWadF3yx0GI5ifyTMctVCo5O7FhkZQ88Xa6rJrw6S4herDuwxqWLbptamRQ-w1Aw0Ro-dMSqFzfD03k2bslWDOotdCH14cqVDZUoa_Ttv_u40NCtrNzm0jkBsfxP3tMN5zkOLpgOn5djsq0GpHl5_TWDuAbiaTYnl7_4s_bm3evJ8v_1IMKWJh0SV3b4SkW7fsR8TdDW-ininL4c0dT44_I2PcqjxSA7rCv_f8AyvVNmSFYXzO3D6PgnQ3hpy20LRFut-8LvmVYUxxPE79yopOibXvPRSNqksUi2_WMAaRG43r6almBuKjeab47kOHOVN_gyX-2BynU8kjUchgqDkn29OPSpFabZmcS3hg-XhrSLM4rqEzzyeTa1b2a6hfqMwt7VMFm3ikUljQjwfqWxAYpCDKbRSFvTIELpRQt_ruSa6VpPfUrv8I-a9eHnYjD5JcgqEzMcGVKp064A6KNvr1Qo0xgY4EGobxCAS_oK-uKCbHaD_7sRRQNOIXUJYb6gwl4VyMWmNRmae9wJUZcAKwErVj_1WMWDCUQw_-6_2kBqxR5LBtkDkfBLtXjpOUus4rWD_JOZ8HaFxjhtJCT9RUa7KUQz8pTWX3TAvHvrBMNVe39HhfdIP_YwaqzPzFFZR03YYssvUMhhV5-o8hxqRuUayDQs-PONCYJYW6trtQvz5v-RmJNuXwBIqwnjTGqVKiaz79qwdqQevMMb_WA4s", "ciphertext": "6aJMWpn-x_Yc0ltWt50xOGyCyNIJOVB9F5P3ImqDWjFROrlcxzlN-P--Ht3CcFcCbghu7qPPya3Rl_eEQDi0dqj-YuVB8Iwm8hYD_c7Y3NALHDOURIDIkqG9jLo4vDenlu7gxTKfAKIat4Vj2hG4r5DYOBC665aj6wHkyI49ZdpOdL2jUj5_uR5Wbtf_TL6VxNYEP0nbQJ25znOqq-fO1IoaZtn0nOdV88g2vaX7ybGCe11jgvr19l6Ys5TGU7AHrUO_WC2oXak8pfxFgNP6aDJijj-PmwGyCOwAZJ7S9kqC3X0iUZi54phqfOGJM7OZArv_xP6MfGaKqtHbFeSXdUilu0m1FpRk4zZRMDwkentztQWVpoWUZ-eBD34Kqgmg-w" } Figure 38: HPKE-14 Flattened JWE JSON Serialization eyJhbGciOiJIUEtFLTE0Iiwia2lkIjoidFRkMnJ2aU5FV21sRFN2NTVpN2JwT0JrWWdpNW5ZdUdHNDRwdFJoVjUxQSJ9.ZP5RugHbTix4Mt_Pu4A05QRcq5CpMyItvXR9eoC10M-t-OYq4nNtNkHrJSLyS8jquuviJ8bxPpY4SnGjt6V4al28t_ErevUqxrxwF_vjHcGs5LOyfLU6EA7Gy5Zc13GDrnKegBAYph3TfN3M8TNAgJqfBuV6C6UB94CrWDf4GlRyt5v3_fBIJAg2RBwH4wxlwX7T88iyhYmNPLDo0d9WTVZ379Xv2Af8K5HHw0wvCWQRn-0pbSDTEbIzu7fyju51pIvhMYRIWV_mtF5mOqjjBPymu8Nm6UL3-mN8kuKDwfDEnjBMZnpi1frhB51Akj8VgyD2t-5F0YCZDXo2khfRphWdfmYljunMiq3dEAv1BtPaEPu2BUKcEPJEplo3lfz3HXZowJC3Gpq7GPrEhu-5ra3P6ZE2hlNvbdwTWt-c4qCvYFZiyDaRB-W1QwPC5iEyj4AX4zc8sBWhqq-AIyJrZeiH7VXwWOYD_cajZlm3Pb-gdFdX2Xej1SAgQOtCubTyR7OUs2DDNJcalmJswl8nHLo4rjalAsC41X7g8j7-6w7LoAb9I4rgvoWf0p3w_nja5PvajoqZgvERrYDhUwNqgJUcIWg16ucVhYl1KwJ09ylHCmSC0Q26nmimQ8-ty_ZWCiuyKwx5LHuk3nqzBzCIJalA5JdtK_PyZ66nCy7yq4oNqpKbAxEUliKflxiT8OexUW8T1f0vMcN3BCjPQFTxXlDkggalu7-X6cfxz0NqImJ0sAzZ4glqhvWOEJZRCHTDq_uKacUUYx4EhMls7XvfrHUcVtdFZpfNbE5SF_O-L9e9bEe3A1Q_XeVLoq4TKycYTSlIYEbxne-thzbCRsbfoU2ZC4O3AN-6YGonVizLJcuAyKGP4LgTRjgmGKAO7hKs57x398FHGmcSWRPLBcPTsWkgiVfRjv-AZxRh5A5hVwR7H37CjajMey6DLxLe258xEwEp9aUvE47WZdt1LvJo4LxL0TXddCXl0XLGlOM61ULP8h7EGD9Ju0BNaUHsUgSoUii70UM4TNE5QhGpLi7Jqd9H9ims725IzB0pChrpIWd1WmRhmo_pbqn6_8RWgiJSc03_y5FBQ9zdhzJ99i67j8pWFiw7yXjEcYCBj36znvgS8HltSxsc6j-ECIbhJJZQdem_8TTKy_wmmFrTcU27AaiDsBINSZyBTgrdWP83zRfkr4HkOJSuaTkuw3NCzHWgMM8zOEHD19hDT4x-N8jvxaAlp0cjZVHKZobIvSgyCE3DMSyOacltz1o3OTPbzUeT9FTXUEqUGLT3NTdD3Poe9-pINQgek3uNA3ihL8LBlnlN5NnJ-bKQLxAdtbCyr0xnpJSGnAFXrANyE6eupaCWeRPinlUTjKfnZuEbGpvtZ7xv_Bnvx-7Pt0ecz8BVWiUOUtaMT4PNMoNZxCe3lOXVl5aeH33TeUdWtlNiQ0A7Yns..5zAVwDsdj8PIEMWvwGbW0enbH3dPtmorf-e0mXFuCLF4W46jVikY08EhYgl9MfCpdw6TsGMB01wqIQeKNeEXmSutrKzv7Ptk-c-CnERT03lVXna0tM2sPtfc6yxZdCoYaKLUibR8iRseVFYgzg5s8dpSqbl9om1wryBrLIjaf-y_W8WWglJ73qVlANslgJgt-TDuLx5Fi1L9NCfB_Sp3O7ZZhoLlH0HwKSBrMNPVti_1OrmtA_51rQYVEer6WM9Ppy5aqnGrdYC5dEhmFbgVjia3P3BzETAOYxvPI8o48yRKReu6GXPxZs-PnhifmNYEYNdDjR4Q3rqA-MLra25SEh7W5_BBDzTBZK-Fooa5-Y-5PDU5xgWhae2ErXsNPJuw_w. Figure 39: HPKE-14 JWE Compact Serialization A.14. HPKE-14-KE { "kty": "AKP", "alg": "HPKE-14-KE", "kid": "7BWJHphdDp43WeKHRiCJq8brdH_QZaPcqOdxp8Cx_5w", "pub": "RNNzFVw6RPUq_fEOf6KOUuy1ykikeZbCkAo9LCVr5CkPIEgLS6wRNFORcMxlutHJUkLFl2PJqDG-qqGgeWknYmhqfxZyrDW6mADI5psA4lFdljNeMps7wXyV8hW5_gJ_5xMSnERJUraHGYiIsbYli5qTMfI_VRk0l0yT_YlRfJQbB0iO0fhO6eu8gnQI0ICLBjBlebwSdpKfQ4MU5TVEZfF5XcY4bvtXtDCHPCKjf4U5HPanLokYXZkRIdMJbxM0kCcG28i_MpaC38R6QKgxiNhjCZQdfuS6bYlJCocupsC9OCYKnGcpjrCdVHF7u3lAZPRwRjW8aOut1uAmziihwngPP7y5C1VF-VadDGk6FXIKsKEQzcgG_6o9koPCdZkh4JVzzSShOaZrb8C1HxYTp8ZC6sYpVdmZXvdtOOhMUAofwSpOAttN3gk6y0cWOnc8Jfs_0wkDhkl8-yB7-oV1xsSRM8c1wioyo1jMTuc2kBKzB_aLr_EVyGEC3vh_7VhkIUJSpZOQHQxyTylnYIs7H1FzuZSBsodirigqi-OPelINm8ZKMgqxoAdqocMYIuPIaOiTHPjHkWLF2pde9pJI89oqdSWE5RXBfcCSZFAGZvYf-YdZHGR9NAcjzUaz-pkbnVGTGQWylloCgQTCe8EPUnImW5RVYuA2TpuzOWutmkFeXEoQzXsKb5XGdfQZ7fMQitiuIEtCxHNqeFnO1HdM3_sR6yI6mliakWx4qNwf98k7YvmZufQuEHXNaSyXoswFa1inD-iJM4wk_1jPQex9ugR6fJF0GSLI23QtNkQcOcEvhoowqIO_fMB4RFAn_-KlS7iZeBiIN0qVR4YKgiKAsoWgRctPbAqGX4ecqRnPKvhmw7g22zcNF7cW9CwWKEEeX0qR2ORUlYRaAys7erNh4NyT3CURykmcuyhaOyGoR7ObO6IpeZN_ofBg3NAeXdKTcoxd5sdl3dNJtUpy67Qj_GMws3WwAkye7MVD6PnILwJIx3sKS5dp30SlhPODg1IGPTtQDjo88YMyMXkjzig9_TiMO4S4L3xJwhMAnOBwCOEUHzODC3wgVjskWHavg0WsHKgy-PCzYRGS2Gkr6cQ9yCtop5GbE2XGv1UhjUrOifeuGtAsvPc74LxGB7h-iRSH6VvEo0QKcGcYI_h3TipOQrS7S3oq-Fx60vm2dBRcxYTDYmWfTiloZFiSY2K112hdbYhFuvskRdMrdwGj06oMf5FS2BtnIQlGRsokrcgUq0ITD-urnEgVHdIFd9hPlCG0LESazwuGP_BIsZczC7GsfHHGf6A3wcuJzghdCet-2-ay3Fm4rPU-d0Bm1dS1FHOIZSUwpnZfcOoc-_xRnetWxQA2l0qZX7iOiEdsgFtvh8EUDERsKnSj4YFx-wR5IKQ7c-a8RUgemhsJNbFHTpDH4OCGrplKCySkZgYw9fE6jqyJoDqCadMs76IjG5Swp_mUOiUOuZmEWmsMtKUEPmNiNfojEvk1mdyP3eFZazUnhHGJSKYM7zCv4tgBAWxgW2JUM_qMDb-VNEAqLf-02Htt9uFnw1Iuk-sckMHfcogpKPU", "priv": "Hb3zfRRFdGQl0I9cMurrDBR82FDNmkbxfC9aHBfAbOnCOYx-v-uiPuHxc6I4s4tIxmusMpWYHtAh5PCOekQgqw" } Figure 40: HPKE-14-KE Private JWK { "protected": "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", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "iv": "pMkpDTKo8w1fQKf8", "ciphertext": "A7KIQ8cBai8seXDfYlswOxAi8OVFsmbd2NZQGdtIvHsBNtGTpRSf3IFM2QNSKJrr5J4rvwaCPEav0dgAPq1vdjGYzVhgApvBu589G81UGJQz11262vqXn0sGnsTozZSKZ-4LfEobLiZwgLLOL63HtaRkHSUtv8gvti9zsq9oG0hTrJOEsq_vGuzNYOYR2CH-F7_StQlfg122UYFLASE_WxAf0erVHp3nDnJ6dU4oEtCNAd2UXot1DKzxBPVsR4BCJFmNkoJl4sQ5KzZDUqo9alghazaFobnvJjiLZmMYG8qZ36MyBSTmbQLfjOM5UurtF7fMRWkPlkadbW4Mcu9AiDIcEYK7XsdOLEI9GP4lTHuw", "tag": "lo85SGTZM7L0EtxiLUZb0Q", "encrypted_key": "MTvV9_ja9VljRM8jFxjnbnQYKi42hsWU-ym50Gh73e7IcBJgpFcdFLREaJs74TO_" } Skokan & Campbell Expires 12 August 2026 [Page 23] Internet-Draft JOSE HPKE PQ February 2026 Figure 41: HPKE-14-KE Flattened JWE JSON Serialization 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.pUFBSTN1UwoAcUmaAV_Y-BN9JkIIO81rjoY_J3WOCLrmHFCD4pOtqbxz6qXabi7C.m0qOIOM8WLG6BSlQ.xRhjUVCb4iDeoz35EvoZVPkXHPfEFCqcem_OAsdoEAjGfL_SbjsUCMEa_WLo93oY9FGJ5v4XvqkDssgRejSk2CHqZNTKsCl7kdpGWpAdVmpspfriScs1W4rAdwS51ezAy8WEbtPeIWsqbZgD06OwiIh6q2RW0XyvDSkHxD4kFr6cW9bsKxtsoXYRcMSwrQ4R5InkS7s_OjdKVZ5WBl6_2ebIaUwu7YxQs5R_PTTUHVQjAkAUq9Y4N5EoHbyyLJ5o_42MHVmef5yEgzxYPuI4BpwChUXAM9kgp2cy0LzjsQx0qCTraLcF4eF73y7NxSLsW3kHFLx_rT33JwmNrOGVdUbYRhmRm2JXc5EEXAChvvKE.8vrAlP5KTXVBcojU-vO2dA Figure 42: HPKE-14-KE JWE Compact Serialization A.15. HPKE-15 { "kty": "AKP", "alg": "HPKE-15", "kid": "ZGM6NvYI58WstMDq7U_u7MEL5ZJf4aswWZBOyEqVIHo", "pub": "2qrLZycIp1uSVzC0B7Nck2cweEC4OFZmKNCYuUZWymnDYPCP3BNMzfgQnaoIQei1LVNkaEQwDDNE1Eo_dtAN_jwf1wqN7dt2t1aH0ds-syNm6bsqjugwl3mnhOW4oZOhEut-YGMQQ8wensFWFPhcqOSdwFmWv_S5aZR60fYt4ggKS6eh6FcKbdOMEcSytDodKhwtSbkuEHuim5ZnNjRTiznIo9vFQzi0C7BZZfNF7-A0t8l-2wexEPpxkCVUvmxoK9qN9xRT8RRHNAF6__ku_-PJEdMkHoKu9aoj4leu03ZnT3ZdxVkmWrldg9NOzXNXkPe1c0WUPUwfJyIhpAhP-3WmzIAQhNAaAMIiVLZ2rCirKROl6PFTC6oRwnaYEMhBgIMlUAxADjoEVgpmlldijfSOUahOegTCvDLBz7XEH7SLiXBpLrIoOYgFSDmFUbcLyNO0mbF2sebD23ezAFpVBxY95pklmMsU0tiyi2qSU3F3Y6OxIOhEDoCiY8tSMSxMWVZ93wwQUOtgyaUXiFqTXbN5g_dd3BJAgltRa1eqb3SH__Cw-wZDdtsjGElT1lgGiQm2D4tJb8Z86vIIm6STRKzL11YXZNunH1miqdx3XGiYgbcLXAABspS6rqE_yAaPyNkAnGKh46FilDF7DzVwMFsaLqgX2MFvHgIOYPR0JSMVYDOFINlxziZdh1NNn_Neb0og23KfBBlsZEBJA-mG46Mv6Axx0YOsx8QhSbmie_ImEAQw4DkFnVxabqKNWWPKHeA-soQAr7IcjnBxZOudwIo6qENjC0JNf8K493Ngf9wzCKohE7UJYeVixggF4Ykl2Qp0eRKQdNGygUeSV-SABuuvbQJNVSdjmqGSlJXOTds7w_KgIzqHPOokdrZLOQyC81hpeVwQJAGbmRy6oxUq3HTJ3IepPCJ1BMxLQkIvsYitbjMlH_sKlyEcYGpS6lwI2qAERigUZDdHWTm5swscXbqMzHUoC1J7DJeONUqh6PozHNQJqRAR2WyvjYCm8AkJv-U1l8iQ8UtIjoUI9mlCQGxk_bppX1aKfutIugM2GHfBdBiwtYvOrTkNibxev8CQfrVrLwswTto4NONqTtkD3hFjZSlao0OhhkakYRZf9KBY8TmE-GOQ0VIlNmVFH8tbPgw8aHMVq-EcodhWI0bDxCuvcCJnESgAVBq5kbRrohYPcVghF5lqN9OEcGbM__FsxpnDT-oVirsMHWJdLbkH6gRizTtK2IwijKtxNeI_u8cMtFEbJFM34kgW_kt4YRIipLYWTrC4uQWRN9mK29QPj8lu0mpfnkcMaCYXljLOjewlPaVoeNmKgRLKi5lzFyRzadiiqvIVbYiJxXaexua5yblKyVLJu-axVye0qWgqOgwA2kG-8BfFRdONyZAnwHs_riAw4mElIsQyvNeUyBDOjgxL1iNRN-tD4eUrbkdN9CuCI7QddIsqn1I-IclbSPnPapEzfCnGlpJWryiamCICWbyQmpUMhVpb6dlSBGB7YjN41CgXCnp3QGHKzwFf6yKYgZXI0edmG0UWdB8KXsL4N9BSZ7c9Sylgcgo-YYDGAF4", "priv": "pdAf_z4ndILPTG3a9oDpluy85vzVupYFvu4GYkJXgOBpm1MXuljgxJNSscynZ75LPSl3hcbGhGEeerhFmksIeg" } Figure 43: HPKE-15 Private JWK { "protected": "eyJhbGciOiJIUEtFLTE1Iiwia2lkIjoiWkdNNk52WUk1OFdzdE1EcTdVX3U3TUVMNVpKZjRhc3dXWkJPeUVxVklIbyJ9", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "encrypted_key": "dkXwmkS5DhliGgZoKYHpbsA7qfhYz8zPy0ijhJkWD1pBW2rwArljom5CmRZ75DklCA27MSQlB2I1U5avR7jpMu7Lo2V4sSkf-0GEdMbCmujnKwu-aIJqBglvQK20yyMvQJZ4uVQa4wagxEwOsxcjMFx8waRNjb_vW8DZqs6xoSoQElBGnh1LKxLh3iQhzEye4aMLZFz3UjBf5560JaT0rnYVNP6IRMo7iZBrsXEfPw4G9K06BHaozG972FBvPwrMp60pwdmo4_pEsajlothC6rsd9UWLKBHN9cK6UgPmOS6u2nd01d9eW6Gu_LHJ92tdLT-q89TpnteJiMAaVnVqqTwrJ8IKYfOog2cbYDvg9PZXbF_dQoCYf7t5rKX_aiTgIxtilhElZnlpMyZwg1Y-qGwRtV6zw68sv37kNuSSW1WfiIX6nBZdI9qRYqRYsZlNhSevEbD6OyL7b6fhmShhlGcswSzaj3ut1nnBnThJnQbzLTzWWcChm7YcAgimEClC9BZyFP3WO3dYSpCfgrB-7V_3m9hlLqdRYdNE5WZs86kgIApkFT0h3z7pR2HxYkx2t2-Gf_fjN5x2IsZ_cKIrzzTA46oJtD9sXjQxEFdlHbQxHrtgsTMs8FWK7QGmC1QRlKnLme0dye8z0ri5ckJqg-92OhmWqo0BLB4LN_HPgjdRsznlcWmDDLsKyZT5x9YBBlMXnn8ouV_NI1gwOkTtWWolyWhdUt25im2p1gqmHLlD8z77rkqwi0RHxC58sfSD2p9oUpX8xdESq5KQEKSVyI-U2uU63lNFEDVsZxptInwPv5JM4JmInQmTsqktSUFBI1Pe3ZboeabdpZxwKBCO2IR055AUFDYQykdEHsiiSe8TKT13wkc_Jn-pImrYtUDhYOk-V1L0Jz5MHyIusUjjKi_5netW_tblgKWR0tKh6Bokcf6sNy9d2nFKayAiLw_mvfYLV1W6BErg5sVWRdWkzYYMtDse-ssc57A-PAMj8LuuVZpkpDlqWWeVLp3iNEg8g6t_ZrNvyBnhPtGXTg7x4uew1OcE52dTCnAEqOk8Bt_ld1Zywtk7XKieseSsbwq2LuBSQqiDJKLbJTWUg5ec2PPqvJFhivSpflamdzBqFKUCrLaL36PzVZFiQ5SXRaxirTYnOioA7kCUY0LHSkZMcfhD29HN06kF_8o4G69ErhTvdtULzDsVD5SBuo6hDXrP6i-q6u9iFLe-2gq2ZPBzHCApmfzs2HuK2kQUDqI6bycRb4Id3lSxuE-Pko8_qmukMxGvGlqHDhC_jPpcMo81b7hzRVDVFl58aqkc2m2p-WC-_lR1ulJAS1WATcDExEOuEWtZEG5LkVLLSdvrz8gbtDtZnMxbZPi8DEsnJyu2BnlAIKMHLD5hbOcW95YcKDqhR6pdgws0xn4S999mYi3w7X9QdL2IgbMEwoBi9kHZGLs", "ciphertext": "w6dLvmV0guszLYz5Lfd1oJlYHt-6MH2LlZc9kg8zSmAxWAJe34Or9ezbHFhdCNrHEMqsep5iFWEcqfpgrelZAJDbg9dl5o7y8mdy3iizKTMKRz9G7SSrOooux7K4NIhcCHqQhthPicSHEVbb90as-e5wvySNzbOp3SKSmf1NJ-dWkQctl_DDPVE1s9NCXLwqKOdMCdH0MBZrhevWHDe5nzD7SmMMEp2ZkyY7DQTU4HrAVZ2d9rgDYrcCpwYGq1FiklI9sEOJ3mP2JzaGlAWC63JMDeI7DinKWVBTjgBUqOyRE6Q3NAZFKzrNt-F6lxqCmXCIGQEjOcTe_QSqFtXQr65j-Ehdm_zgQaonvaLx0ZSEwY70fwPIX2VzP2r1WdAiFg" } Figure 44: HPKE-15 Flattened JWE JSON Serialization eyJhbGciOiJIUEtFLTE1Iiwia2lkIjoiWkdNNk52WUk1OFdzdE1EcTdVX3U3TUVMNVpKZjRhc3dXWkJPeUVxVklIbyJ9.F2le5B9l9Ysnrf7DAF5rOIlB2yKNcVJ1e3PMRLRz1w2FcFGBWiivrwmmCBMo90s3WrJq-aHEGSoG4IzUIdTKnR1nQyy1E8SbQqV69AeyFZE4r3k_Q8khIbSkLnYdDpBV-SWuIxOmlTTXuGjd5TIAoz1yv4stjqmzGeBJB-PCEv0Ufhg6n2diZeKgLRvEcdeDipQ_o1dowSqTDWEe-LYIu1lCwL4IKrQdHsDYnb-K2chGFAlpGcqw40P-McEPihI1xWbjOdnb096txeU6Xd0HxV4qOVVVAm73Tzm-_5gWuBDDyue7DI_SLXNiPHG2Bisbx-M5YVrNRWpQSCXjL8yg2h6J1MIzpEGa9ee7JVkBZcEwfUSK88j-1BNmk-2lkCHcen6cTDI3VbbWheA90XC5TqSZ3WxoLpfPxhGSs76c6rZ9gP_d9CtDTxg-SDwlvJJx7E1gtMtrHw6CU4DUK2YJzo_9_ITZjuMlNrRv2V_t0TVvNROwYLjkzwPaXyG-EY2XBngtc9yaGYFfd7-AkxbRf5iokUkG61etVvDsEXb2RK9XZIH3CyEeyDWxCdVKW03vksXKnQgNBQZOz-6Z2O0Ir4LzG5auKW_W4uf95FZ-Ch52AR56p6WQmw7d3eofUa1tCYxjm_2ApqoCm_hV-83kFyyZy8YItBgiO7lzdZFq4dDp2kAp5VQuPg2j9noclZgheKAJ1M1_XblG43st-L56-n44U6ouVDhbDmGD6RB9p_H0cCMlrl1nvzJ2UAfHCP0mDGWqzLxwr3YJP1FBuLqtPBMQmIStbS5lDFnXz2JhBRQ_tiulR7AXPUVU5lMvjBPfzKTUA-O5NfOXUVmG1M4Pl2gecTJHiw4kvfTsERFkvDq99-ifQoseFVYJOkmddeIwZYRD76mOfrkAcYzTR0yWjfj3fgy1R1gHSURktDVgdudrlp0hAW4QFK8cgPnsv7d1cDz-NjjvFp4a879nXKEc1wb8Vd5g8BWOVDBOu4CWqMcXB_Os6jGhfqboZ8aeDOuLvfsLuYro2V6XyJs4PYGURwz67IC8TvcUzmKg3vMShGhjU9WiZtHGAZFx9bgADtiTll1vcbgL6zTnLb0rUOP98Zb6FO0dPIaWeEDwX0I_NGN8JEHIP3Djb0mRj9-eZWnPOmK1BGV6AzmYPm5PX8Xd872UqdxoPspfvipHVg3hVsHcrthYV4HEKujHkacoZA3FkTfpREjV4bly782sRsF7IW7BHV6KOJ6c2_vT1dpiuSNmjOBInMRqn_66QJbfpoFabtCJ87grjo8hAs7tQ5uq-EIwNiZaU2z-_pP4qVazzYRHW_IHRJv81li0hidylgd7D4FkMZCEsyi2H-hQqEtA04rJx7gj1aN3iXUJ4LJ0Y9to_sylUM2y2mRCHQZnsLhx3N6fyqtacpj2G4PjjTmE8UIRbu28vJhVJN9J_xQBlvo..PQ0C50veoY2_cMCxu0aF8aougc8tboxxViqTTtLXeDutkeh2YP0r2I4hU3Ps-N0FG9t9A6cib7C7Cr1ITU7XQmBWQ75ERgstD4pkmTRK_uZIV7jVDY6h29euM2huhp1-hh61EngbPVdkiIVPvjYBu0m_LdCuMeqJ9Zmuz6_AURdkA567Jz12_xMXRpHMYliLl7_kMzChtAlfcN-_nhKrOizFqwd9C8Sx1eH07P8Mg8mmHObS_9sQblgmKrB7-NZZrGXY0QQ_aCH0Gfe56ZB-THZFm3RzgeF7jxlrds0haJTPyTTbu5Wz5buRRgqY2MCBjFTRlKVigres22kAvxw7R4Iez6PrPMHNdkB4dDZqcr_Q7Gk_0moYoMYbkimOWSHnbg. Figure 45: HPKE-15 JWE Compact Serialization A.16. HPKE-15-KE { "kty": "AKP", "alg": "HPKE-15-KE", "kid": "hRKbl6DMKnXFBvYQNMKY7mVem8y7bZyAvrO-iwa1KMs", "pub": "rwWNymaOwngk_VwtXcAdmJVpdtSt-8K-nUAeLua8q1GrLoHISveTb4W2lFug9UrIoaNocuZcnhO5oYcj5yWr41bM_BFGoOgrqkWF9gHAa0DP4lK1ZrlawfyrNvaYrrtLdKxj9PyQFLHCVgtMs-JDjSdFhmR28UMkfFYCZRLL9SlTJvcVtPSWMdSnv-R8tjazZcc8jMi-NdfLHSGOFOFnSPcKoFAttYm1nis3glocMySCW7ph3zoKa9jJ8jR-a4cfLyBmqeWZIXun6xYzmOixk_G4HUPMcQuZWKEXcjUd2_wJ5jRb7FYoSIgBkJNJaCAx11kmn3JYfAuR6VMKQfRRKyioBnIhB0a2hqgnN6OSXqWg9lgvSLx1hRkGWcMCuol93YZGiLuM-juB97NMXBhvK_ERCZu6ROm7LrOMICGR3GkYqDRnuIxT2DR6v4GP_9ECzooNVKmgEzzFlnd8chpVfTo-vrzIYcahCWwYDRMqB9NnQuVR79kwnbZDv_xu8rIoEKm_xMDF_DAwHntp-hIf5JiN8oPDq6qzaEoDAEe9QdB8QDmK3qF3mmcV_WCdHbO5PPxKrkDJkcMUHCdqaeW2ePaXO5S9h4S9_iNeFHNAzZxsOgoelDepfWl7Kcxd2hEak2Ifh_ArjodwH6EAvXfDr9k90yVinUwJPqAboriuKUGxq-ZulVsEGHdAfbeu43KcqEI4JdCH28Ar_nutKEOsOXltqehFGBRL3dY6F_agYKqxZIiZFbcsTVqkwNvHLda9tig3m0eZuRAdoTC8NDCe2qO5y6B9EylvoaWpqliUuxVEAwdUzYsgWnzJ-ZacylpU_kOqZvLNvXYpNMlyvGuC12KvEHJ0pAJNZqw0-5dKhdk0dwKaMNqW7EE1sLNhJFuNUXlkgQsLKQNGlQSzQagJVmdx_mmEn4JZ7vxrfEtwJhF8XGCeBzQwxuJjrMFRUKNWVWpdg_ivU3B5B_NQgGCfHOrCYwtbn1oP0PB6n3mTYterxyudlYQz-sEMVGsyHCItJMvCs1AqfNiFaAUfPCELZTQOegfDeFAhbImTRNk-LCQQaKgcobiFCxZoBhVlQ5p7oAV6-yGUr5lZMYS3I9udJOVM_myr5QBAKGosy1VD9Kxzd4vM7AqsHjQaliWrl6lzzDKWowWrrDg2W9J811IbdAOaHCF-EjrNIxxzGgZCDaaf5NRcLpC-XuMbWGhDDRF6G_fPMxE5wCTEXaMtWbRHCLmagaeOzPAK9MbNEFGzwvvMa1Ing1d_57NmNNIJ8gcyRSJwVSXDehdHLxehROYZATSPliN9SHEISYyulAJeozjMuYFi5XaP5yyGKQeI_jxULnlEEJI0IglXVCEuLgzOqoQnjGSO51N7RNFLkisju2EbEXeUE-EniPe0i4ZOYXSK8dR9arE3kSV-b0aI2qe146WPYRxJ8DpSmQt2G8VYNCG6NuaJIQVKp6ewdyIYYqGkXCKhLLE1eJfKzMUzBZZCJXejCop07LZb29MQj3IJFNMabjc_iialIco8CYGnbfA4YlaSy_djZzkypKPmCaO2HnyDdH4rrNGh65prWA0QdMA", "priv": "2nnooF569OslD-_JSWfUpKoHdcTACB5PNmKDOFf_3FD9LcxyNCxS-UFDjG0rwKNU5o9jtd1QxKOV0qTKO-bepQ" } Figure 46: HPKE-15-KE Private JWK Skokan & Campbell Expires 12 August 2026 [Page 24] Internet-Draft JOSE HPKE PQ February 2026 { "protected": "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", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "iv": "u1hQIAYmBXujPWjr", "ciphertext": "FC0_4PRrnjaK7MClejTSiOk1TJTLW6hnf81PgSz75p5SY2zlpX_RLohI80Bx58c4Xl7hloVn3miVjRJRoXV6o6EISR_nhApngJZthFiGA5waQS4t8A1RhOanAjxvnB5TByYS8RV-KUhfxidbMVn7QWX-o_kcWcQys1GNh3JxyvfNnMsIE0Ad1CAqJb4mH0l1nPR3BqMWl1U7D_iPQ4lnRAJZz-BV2IYwXX0pC-qVArv8wyeGfcrFGZweFb1TSytN2me2P_WbogdYyyqg99N8QbmKqlv20mDlNXuUDw_t3entF8zdrA-Q06qkYvYA2bIfbaR4AO2jRUNmTP9rxZ-waNC9opZ89uiqNqR7QqoHLlqd", "tag": "7_VEqU4IIQtqp45ky_fXjQ", "encrypted_key": "jWyjtLfOpdFbtcZ7nVrTTl5cbpjZnHWmd5jB0DsweDYxauI6mgFsCTr78xmNrpVE" } Figure 47: HPKE-15-KE Flattened JWE JSON Serialization 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.2wODp0VWHq3ca2J6Q45EFBqZrfqAOBwCYXFLufm6yrUjChuVYcO4Exbb3gQXz_Mt.F7mBMsNT50wX5uf8.YHC1UnsMFlklwSuExABvsTSwcYYkshn_0ITK6rdRh_i5vyx2d6N2rdt6MT9lM3rlcrv9pSqL4fSUvy5g6rdQXyfhF5hgrvN-y4rXAIYI8ZgH0glNAXLjQPdvd-6BfGIn_Sxf9mo9otulKtqzgYbjp5Z4s-7PTS13CRRapcOJn0-eEvQDgI4G4K-Dcf5ncoePQ-y4SBv2CmwNYm64229rkmmNZ8VMpy8wJVRflmiuwC9jGiwX0Pwx5-23fuK0VkMJheihsaYcR_HbjMU1TQohcaO-qoUBoDyQXCkExz-B_QTwPQ1uCDt4kf9ZL0uFDSIfH_wlT-QuEw1lgENIa2ZKI15uye9v0gccWP2qE5PWl8l5.bDxCOdD8iYXkFeZRlyYArA Figure 48: HPKE-15-KE JWE Compact Serialization A.17. HPKE-16 { "kty": "AKP", "alg": "HPKE-16", "kid": "I8JfWq07ay30SY_COHidQ2Y62ZTA8jzU5SKaMag8DWs", "pub": "3yqOZRgLTWIKtdAVtcfNBKWBGcmi54VqPmqXzDGq0ySjp5FHfHq06up4qug6NuOuqHWPKjaRX6s-_beW_YTLWIVxzKMzZmCMhtwQ_eUDeppbPrwwF3WGR2rMZrmPKutNv3CppZkWtBwKLboJ6ChVW1ivYOExNrrPp_o5hZQ73TNXt3gE99hdbOUbr-cMpIMATfNO1MSIpuqZkft9tllGdgm7lWU3WGwE3oZgn8mAapzFuvQqFgYjhENT30iGgIBAp7xKHMY5FfFUvcWIiwl0VhgPANa_AclvZOdcWnp7EpoT6tQnQBSOD_zPdPxuXgl-mjx94thauWJL2-QQ0zR-9Mu-CnkBNaiJzmOt--enuRRGB8uuMboHs7OsGCV3J4WqDBWoswx0NdqUEdVxQwVss_R8fgfDpZWgtxx180ASX1cnr-oJR3BCFBAaMbFfRFhBfkxr82h5n0lPGkCHAqdE12MLUVqWIfeURahwXmJlfSC-YGDGoChtM0kDazgFyKsdL9pbmpNJOagtj0Ug_LAoXLYoJoC7wRdaDNdgdVZ56Yh5d3simaV9tgd7ndU4ndy5HDt6X_JzIpetaMi-zbAV8YtWGjNhWDEMtZe3S6xbloqtMctV12PKhBy1EhW9mkgt7RBHVvao6wA3OPWIYLODJrtfitLGsLsqmbyHK6E7eeRp9yUsD0hdjRMcdbcsbQK79vA2x0l5F3K7Gui_HCkkNzF_1esEGEaYzmpKQidJriN7PzlG-DsoQpU1hYmQEOPIRCN1lIgiqNKdHMwjPOZ6U7JoMekj4AQFXhgokLKGtZZTrKd_8BdbmiI2rtKIIRagLYhT_MtClix25tItLKYDGhBii3Kf_cUlgFyeA4l5myYnDHqnnIS_ieEybwye_qcPRFRiuxazx9yV2vFTSAN4TZg5MtFGNwEwygvNwwVKISequKRVmttw_IgvfmQRmDerg8wqRVy3rxVPDzW8oauiM8QdnFtFTUtwlJOyqKCMQjU7JZhjPikItbtwIPlMLhCcifXNE9OmrNVO1VlSRvwVBIc6NIMuw2AqVNSTYHQCvFF3uvh9p6uJywmfg1icXsUgABJvlpuqKHAXWVJ6kFYBTzqnHSoChNdA0wa8TLkYxcckG4FCL4iUShsa-2VJf6lu7pJqjPudaZprdKiwD0Mj7mym2fStHRmE2qoefiwGMNocFgKVe0s_KyfOe8ZmR5iUzpiAfeYL5dE9GxsutJiMUYqHmCJ71rkHKZodDcUJlEMoTDhDMMPIBkqTjRxDfvqnm-w4yBUEQdCz9ykLyhYT2fMn06pT27Wc8uEFkHMULHRTdWFL6ZSVD7WX2QJh16UIq7e2R1bCsvxQTRc004KKV-uSnUEkt0NbqUh6rHUzVLUeDGJf4uyd0-XBXAM87exSY7V4bCp1uyiq7IQujMym85A9EuBX82e31VBnHlhD0zREy-yx0sIrKIC-SjyLaLt9AgoXVUhW8PwOnrtPcLZ1Btsv5YKNOtTJWuNXKizORXvIWaielZyeoHBBEpFylyY-GlRodQe0N_gKdLV5MVNuFapg2JTHmcIcrwi3CJaRiptBDtxJnOS1WPwxtvsJQkWPhWaqzkYqApjGh6m_8DIXV5xTabp0ojwAuBa9RizHAck2QqEoQZu9F0d6cHSJpCV-o9QoskaLyIp2PXJdUGJ6s5E6R3Wncaecf5xkZta_TEUd-TZkiOx1cmsWFilxhQiN73RHehh97zVJYoS3Whh4gbiOWMKoNRiv9euVkrcAe_dyEnTO2GBM7uKZR_U3JgbPQdId1-uxHJMr7GgmKUpoi6gRHxKp5JoRwydxcYptjEdF2rJwGBVZqSdPfJgXpmEWAUxaIqUOAIbENVUgz1BpQJgCoarBVEAc0YEhaoQ5H1wofdB5dygpS3KNY9Uon7p1zHJnZdYUvdEb8neJatgS-Rq0UgiqJvIiLUAK0OEE4TW_TFI88IG37egFunjEncMX15XD7srFd_YdwOACeZBHZnkC8wKuufZuEGW8feaEcIlPWORVEYACtylZX7kucwK2_zgUxdgODy8Oql5w0uHct6Y_sCGPSfFfBuczO8rYGuM", "priv": "iTLE-qXqN8gkBsHca_rct0437-53kn3BwSBz2VOdDppbXeq5Ru50zy6vQLYUgkdSB8Q7A64dyz57967mHyN7cw" } Figure 49: HPKE-16 Private JWK { "protected": "eyJhbGciOiJIUEtFLTE2Iiwia2lkIjoiSThKZldxMDdheTMwU1lfQ09IaWRRMlk2MlpUQThqelU1U0thTWFnOERXcyJ9", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "encrypted_key": "9SCtl8C5imfrsH0XGTPLe7HyGO4aUlGdcFs4xK17YCiTQ0aC7q0dC_FLTdsKzUO5UiHmc_wJw6DiMNwSuZeA5gn7yGTqidirlBHeDLNnePeq4nS5ER7lYAzP53cobsaWZZ3Cgy5j31xLleK-xypnt2OBAmxIaGquEsfVYaH2fQNQp8EYLLPdRgQyY6DEnWwksr0PsvkgjHY8CquUGiQ_IcbOVF6mUa445Ax1Jp400fDKeyC77v22RZyWQ0jqtWH7oIGhkc67IAXi1GhzKaBZG7_K-NeTU0J_r0yfFRuU1MDaTHFWOBFG06qHBpZcuO7o_gY3gthAl8ghmKlvEDU9W0mymY4PgQxZGBqnUKGq2qpG3j7gtvHRqZ3sExHDVRi2X19XSQYV-0-q5Rt5Xo9i71bDa8R0T179iGEDJgaStuJJOUbdR0Ww7loZpnhpwlyo-DQE0lx64m1VFpjLzwfpX3BU7iBluEBcxzdlNNPOKaIb82gjvYmv8Qd7GpDq_P4nEtNJXP08NcMt9DL8LZFQTlH_MripmQ2phdZPWqsNDzqnucTSGwjAq0WNtHREYWZe7rrC4d4pkLvpA5MwKJD42m6UxPRxIMae6Xw5kMNwQfhI0VyA3aE5WjtA27kQTb64RbGaPyrkTW-n_yMaTZe-qTjwUBsD9zMknO0hiVv8L-MkPBnKjg2BKRJC2RQFfH3cP1DXywmuHJ3wHbRQxg1EVk_pWTn78H-iSQsO0BXwLtA-AlcNJwHImXwALd6fmkvB-omxtlPJ8zj0YZD9Hnv4Ekz1Y97lwQ8OVBVycWoz3-kACbeJ2tQEwGkh3KbczltAvz9_O01znIidUNcKHNO9v0E7Ji2EWP7n2ZoRvR04tb2Cz_dGqdSMawFNccKWDa4h4Pqzj4XsUiJTZPWuUTtP5jkMwSLqCpa8WueQy8fqhyLAWzMcJ0UUNRWS9HkdIJbJl0gIQAxjaLC4TWVXxooyxZn0a9JJqpZudrye71zcZ4cC3YlqsuTRwDRpvHKZSkKQCEZLvwWyBdUtSumtfAyiXFrejFt09aekFgzwYU_B2P0mFwyvzuDambtuedlp9LvqsR9gYnJjff32eXfh_Uqjt6GXJnqEjTDmAm3xfXLilbPPDXF6hTocTtbV1sadDAoBm8KsRUG_4XDTzum8AB7KbBeqqMPVHPIU5VMIvodw-wRWsA1GM8Ibs0zQkeNrsJnchQ8DcvLnvREg5sJZ5HgYsGeHxcBPjio9UJsJ-RTTu6km_ZkgR7HBzO0Wnfs_rxFAMFsDuRlRoCZM2b-8XnVpQlj7PaH6dj8L230BppDeByaQhKUicm1Cum1Lxh2K8KkgGXeiZc0TacAqgpJUyKFxc0x9EM53-jPiDbW0Fx-lb3OMUZKFBlefiOwec-6bLTD-MngJmAuleupgZ6rnut6iKNildvX1W1qkmIpL2av4aoPsxucINkkoet9Ljh9qWKMdeuHy-0NS9CQQnqbX4aRxlXL-k3KXiCLOe__ebyEICDtDrft8X4pQBJS3eiya31C7NJdNkkJdUvtxdibr4dkbvgrN7evniHw80QcUoRfK0J1h81rPW8aRlwB00LdcroJWdL768JbY-X78kqO0nWsd1dBMHxyNUGHJSGgCl4tRp64fcg-Ke6P_SqSgbUHoxNXG5S4Sd6cRH4KXTa2rwWgz29hZm6QlN3cbfUgApnromN8s5bgMGIV3z0hpQWwvwuM5lKu0gzSRugTSCGeubXek4mBxSt3QlJwFYq7i0camhDDWsGCieFrfuoHN5LJUZPSIQfdanrJwYggfPoxxqLeoqsSibQwhT4Fesi-GEEQWwrgTZUJCCJIoxRF1CVha_nfKFPyRLX5cyy6XwlIB63bN-StKD4Y3fMEozJuxJf77wGSShFyBVKnIF9nXV6N2qzsOOQnq9hLaWj4W2ZD9DAea3qFEFDMjdaBSHSNgiDTobQiwOmJXKzbU11X7e0FgEGouXWhG2IJpfumciZgUvl5Q5YyD0p06UZPdt-ngD2ZFRBDT5T44O9sqbtKAYF-APNu8ylDbFSSxvZuSVrNOwtfQFcH_3ZBxjr7o-IDxcP9XZDM", "ciphertext": "t0aZYvdQaiE5S_cps8Gy3putNe9CmV11-x8JhkwXs7b6FVBdWW9hJPvDUy7n-o3nQ57Gb2f9_Pt9Ji_3LAecuTBzGb2TS-xdzvI1RzwxPPtMIULD1ZddshdYFmwX31CJcTrOdYgU47D9pt1uhaYQwn_ILG_gWZ_XrPYwZFKQE-jDidOUfb9SHZMyk8jeEZ-wFMYIjA2B61iIqhHOCsh5aOYPb-H4M_87ETVQy3G4_FSFaY6UgdP76R1wPwiZqJ1wraQ8dX-YRy3b-hF0PFbbySlCQN_xvCGrq22xYiFO-aaZlgdGNZF15O6oB5AseNHN2kUizZTYKhNGX6B1p7fREjYBc1VwP0wHBfZTW4YdKFzQvXwOznEe6o2TY7cGc8u2aQ" } Figure 50: HPKE-16 Flattened JWE JSON Serialization eyJhbGciOiJIUEtFLTE2Iiwia2lkIjoiSThKZldxMDdheTMwU1lfQ09IaWRRMlk2MlpUQThqelU1U0thTWFnOERXcyJ9.vgIJFWxQP5T1it2PGqYOPIk2HUVbPiiaIavXkVv16G-HY8zDIFynWiyae9H1Z0dlKGGUus3JnI5jxL8nzctgxWt_YtpwOpuIDaudMocLEcuJJ7Y9oUV1DcXTPQH5z4k2VfD0SIrws2M8qiDiTaL2JoFAEDRPkH2pbA57pLDYLv6uoWtfdohKJ3coq5_9zz5ZIuzMc2owIOBMuVr-xQSZubrFlGiZ__fbaG-5i3R-HuaNC6yFROPAcMZ7X_wnvA5hpjMct9QVSzcTl7gM_xXYs4BWlw0j-1wT7-kBAHUpWZ3ntfHxKmGqqd9ThZZddHKgeVl1E7OpCeF-ZEEGZS-x5_RS_6lS6p-1Lb43dTc-YzZIVUvECTTBqlUB9MayY8vUhQjedus5BhQmS6xld7N3mlZ3t1ONxsETcj6rG6cDkKCZ-bGD4-ay0jYb_SaTL3vVtnovxuoEWTR6KKcOSzXqHyaExcxYseKbAhKYOEVnj8IMmh7eIZ6p1oOd9LFI_CS3zo3kjS4NG2kVhF0KfoAaYcK4IXsWa67WNNGfRrV3mNFUMtUDXKSBs8qdo8kEjC397saxKFSCfw-I8uaKRhzb85xJNgDtpYbmCBlMKiOQATX1qutAQw4utpEIHusyySvXhakjbmYUE1HNhMsd7cOJojKr_rFOYSWBCumbosOsPmMrNwJNSfsgvj4ucnkmBHKa3nBAOY_SjwTOaJlKsMYvKq6JO8kuGBFxX9MuBrBEIpaeOxB_KUsJL24fx6vL4oISr2QA2RxL4r9nc1kqLTKneCq_aq6D1Mg_mH2_qnRn7UZLLJjGYe4xgo3QPUiCyh4DQEyxG8zUrpLJ3fx7a-4p1rhNC9FKnJwc3RUwL7jaSJIdHtC9Tv3UHg_S4dzPijiRBFqLzi2Wjt05zjs2ySa8egehsoS8-sYUjZKVWsi4wFFlkAnQcrkMoSNxhgGufZGmLbatQy6oN-sNTzLr6jfJnD9tsAB4oBpTR1lNMadXth8dvYKk2z702I6BfzAEKl98DDo2f3fL3vv_WPOeswXQyY0KAzTlnIxsGxzDnBlea6NRAFOMp6o9XpCA95rcvVjf9ODAO_S0q22mOeMaz7Vu9G7KRFui8YXUO-KjmM6128p7RQSf_fX4DggOvSF3FTsaIcZ-8ggMDjpAT5aRyGOki5rIxAWH_YhVks6SIymUj0MUYh_GfWCS9SJsLDjMKfdHbabTM20HvTQr6JYHifzVzsnzMGwN7NU5Mx8z9QTJ-8_RBFiOpDEj7X3EcsePiGI5YKCf6KuAmT2JzRiNq_-gXc4igMbv7PR9ezQ1foHOJTsJl0qBS-EpHu1_Sv9FkBrqXiAVsDMSPZhFQjBN0WafejQ-UBAEMZx_C1dZmeVf76GWZCTBczhGGv6s5hpaKOh_IY_yI-72C3Wum7sG0ruXPa_NbSjUizeNUJ_kKhJCmObWaxdXlvWwu6epT070WaHYGCkem0PoV5mH3K9ManF1VWnsrcl2m87SydlpiR2Oh-ZA4W6jI7co-3GNsdGbVhtNA5mD_IP8eVgN2zdNKhdzkFb06Vsi8hBWOgAmIFw8KP5UY7DZH4iiWDaXvUnCQC8yub2iuidbAOJQJodIMq1wKAgGGPhwaj2JA1dw7T4G2by2A5QcwBTvSee4ikgGFXhfsErgREpLg5ojpUwn15CQrz0VFFua_VW4oqZf4RmcBVu4-xidWf0s08NdCPWnsHMeAbfgovM_4ro_xekFtuMs3eayKEffo2rLLwyCI0WjKk1NQiYcPUtqX10JeQlRWVlRDnAWKaA2Q2fEN8OMj-XhSkgqwCsh7lUx-TT2doEt-ZJVJ4uja3d5wmRl8mGqCsjtscitqCA04cxzHEMkLitDXl0xE_2p5n-zyE36GkoCHHxFNq8zDozy3PTpgCyZ2Bl2yuIpw1dYNNmY6Q5pC2ORCFQMonzvEMwRJ2AGlZVl4fIgpE79xEw6Irb0VBNZyUGkxL0KwejiD9VTDXdqG4ILF7x3_ctfNis4IYfEcm3DCygzJ6kX8-sLdyOQk7-JXdIOXV_dJnDdcM_Q-I3ouewvn4hd-mWCU44MDmTqPNvr6Tw.._PneAnhrXaXywIX1_ueYhGnmTtLkHnPOjD3Q2-Cxcx3XUtyAEiN4kZunwUVrppRqWq7xd3KkGmjXZCP6SP37fPlnPnHZhBUMdf2G0XnPcnyA3nCfSrjYWmg3klImuQPt3uWIiFxwRp9gW6bp-VPbyuYbK8atf3aGm-PxgL71RMAiUkW3oLASPEAnzTnv1VLEgoWp6Ujld2EOChzwNZz1OnuCDT6Eyr7toQ37xLE9Sy625du7V-xUMvIhXSqWVXlxkxMfc0UMc_Nhc2zZ2n6m3VCP-EMQV6bPBN8QKT5_u9lVW0fTaWxXgAfqv2nbuXitBl8VwWgxrJJdh64kV6R2x9YQBj3VjV-5AUGEBWB44dGMXEfEBW_GwRdaMvysEQ-Vdg. Figure 51: HPKE-16 JWE Compact Serialization A.18. HPKE-16-KE Skokan & Campbell Expires 12 August 2026 [Page 25] Internet-Draft JOSE HPKE PQ February 2026 { "kty": "AKP", "alg": "HPKE-16-KE", "kid": "fp7xFR02KVoSNoplFuqmztr0Y1SeZdEHrDKyP3-PpMg", "pub": "b9qWvEdkGIscWrHN18uSxDXG3wC1XJJJzEodohGvzUErjph_5DmT3Btf1xyixux4M8lImQeCO8V6IXjELxajS0Zcnxew-SqL6RO_c6NJFVUjGNJgipofRpRmoTm0mAV93rF10AJ3dSfPeORGoSqAYiGujdkdSLqfHnlsu2yAiFUbhZV2O8xHGSR1XIeIg6miIoOuJwzDF0UGbKsrAQS2JIdEYfF7LVVgsDB8teOOe5p0fMCLhihi3naM_UUKmyuahiNspuWP9ehQ4EZfrqicGSYfuRLGuLiuipNaSwROZjMw8nUc3jJlKVUukfQeVWQKdJi7ZnXMDadysIFarrBJyhKzqelv_tsVtICA9nIbjrGGoSlYSYadrLaUW6sU7AqdbxUQeqMiTpFY8_OAoWrKXPR-p9BkVptOBINeCfRZnZvEE8sBRLIyt8cuOdAig2iWb5F3Y0cxxTdX4gFOzphtQZBRF6yWv3RhQsWwm-m2u4ojRJS2PrYhm4eyGUEH45h-8rMaq-mqqhnFeYC9bAdn0Ul55Uc7wPUf7jA7L6RLuqLMA3ucRGvOKfEwQLi6pNNdfFDBRPs6XAxgebyfzAMWVLmgePSnALu2cTB_pViu_CEI3nGKuYMoXayWF5bCtbo8cQvEjsK7mnqTUmctpdtJDMdldPWApCq-SwUl99eshnRr8Dx3zgEAR9jAAVwtcRFeT6oFoMQqL_MwaECvcSyws6qogbBywFWw6GiqerAQAfBU28COb4u0eSpWBRayMduhziZbyhNF6WOwIohaJFAe8rt1VIkBQgxeZNKxIwI54-FZn1A6fKVzgzGFR9V-fUpOO4lpUzoHv5kRhjUM_VimWceAb-lzsPHK49QXFTWCQ1ELGrR5mAi21tFtC7EE4_Yh3tovTggj7AYPQBnObWqHv6k5ssCNqfuWObGATLuaE1tOx3ZP_MW0k5EPAEKiFLINZCoKDfo8ulAZF2F88eNUSjUTWke627CG_hXCmEAu5uSaSmtHvpjG0RsDmPBojVFWSod90bJQObmgwPvAZ6cxTQRekyxPAsLPwBetqqc3I8IDZUuTcMdmhtkIfXxZNFiXOPc-twB_NwAHiou4MDqZYatV_0QEqatNIwuoxemKf5QG4FCurEo_H8W0O3cKe6gNgnpTcGgknmMDmnVq46cHvcGdxIjOh-eX1TQL1QS7XYd7xykxw0Mc_TVJoysn7CR04FKkDWwRFQVSzGGApSK1fEN3LaxC4cUBilkLSmWJEIjOE-eJFAA62WE911uSFmQeVIe88mx5C1ONdBrHOQLI6JsoNcFG0Hke1Sk3dvA3yTEEYlOg0saF3URvpsJUc9gy21EEugOxAScsfbEVf3oqlZmAopGNBCQzn5KrEgKvZyVZj3ZM7CcSTeugWPcp0hI27NYDHnUSUjdPLolJzOinIHykY0WoQ1Etx6pnBDfAo8FcBXEafIOZFxAg9hFopolShGGz1GBBzjin5BirX1Ielqd7R4FRtAbBJgAhNsukEAYuWYhI9JUPVymSISm6MZcHuWp8JKU0Q2dS2FImjEeMm9VMIEdQtwlPZ3i3JdAgGQNfa0o1JWEzcQNcerApY_c4SxnGQ9V6L_gJ6SmA9atK42WRREIURWFTA3xn9zVS0-gY72h-V2W0gGchCHBQLCBf3roWp0W-SDRRZ3wCKdargnh9hNwQO7MNJvVYYEuQodzKF9d0I_MOKsjCEagi7VkOrGzFL-ypoeeMqRyWEksYTNKLCMfDCtet_JMkp4ZYECme7aslDyh_V2uQaMUmK5u838Wj6fJHZCZR-ENOrsEKSxFNLpke5OosRwBA01ZZFrclaqmPVVw9fqc49wZQ-3ZaSNlKm5bL09slXlSZnFd_NnFzyRyekNq-CrZ40EJt-TCoqQJmEZKu95MlW0hM7JQUQDGOD1dvQAUrE9TCGSoy6hmaPcvAgDOTVTY-hRoQt3lY64LIe2PCkGphKkSp4AJvMBa-lZSh-bkx6MPDI7ZqgbOeIBGtskackyhxs8O6ORNd48Noj2SlzqcnMeNUdVVwSd1GgHF7XsoI9B75mib4ohphIg-NndvckxCNEUtZbgQ", "priv": "HtyU6HdQnRWu6bsyxJOsXsKf8VzkEpioQY-G3nOQF4cmGn30-0l8ig7fSTc2ZQqC-lI6Hib4uxXHHwO8chLdFA" } Figure 52: HPKE-16-KE Private JWK { "protected": "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", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "iv": "jGzcw7nTSxcmnbtf", "ciphertext": "3YHbZCBPMVQRvr39aLYdHQ4xb2EeuV_Ko-d2X5AmIjt9Bi8RhK_RYB63q_D0YCOTTuIfgbKAWrdh5Fi3UwCpvVk3ZadNVjYEKmqWmu7WU_7hYX__hBHdxMi3BHc10grMgBo7T_BHBFz_RGRBmdtx4-X7uX_WFalLK1olr4tuxQUC5j8JAOQIsmHvNbNVQX1QzSii2TSpMB2KO6e9-wKMIcwgtsUUKWGC00BAnkAjpNtQP477uabz3gYaSwtbMd8-AyvsR9-7yaz-uRODBXDr4_xlHZWDgjbeqwApRurEPvGgaKJIV96bWpNVWIU4WzvDEolRkgcdE4u26N328Wp9OnyGRVgoAY14W7uvfk5JaNCu", "tag": "mTh7DfqlSHP5sGt4ZnYOgQ", "encrypted_key": "TuOhaiJVyK3Pjic_XPNJivjJS42eCyo2pz4HVNUIb-SSPCYEffEAf0F8LEOhpWHP" } Figure 53: HPKE-16-KE Flattened JWE JSON Serialization 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.xzRGj4HEx_bxAF7v4Gywoj4IoZytz25KNiSkQiNtzDCx1kL6V81cntf0JoPKU6ZA.l9JgcEwO0nPYNM-1.5ZPwol7KmPIJ1ZOR_KtuXm7pH-Qio1K1fTR0AUrWSeMtCv2LWHZ1FDiq7MnbLC6pxp-JZ_2CNaHvLLCdSMaQi0td9Vg3GLYLwI6stuGzURSBAoIjS8gdTOrB13aAoVJ9p7OVJ93xPP_Z_Y1VD8yrHrvOkF35cXv9MHWEGs_1b3ziHS2yqtKfOZ5uZnyNBynTpziIIXCIcWAU1atU4akiDAqFCWEOyzaHAAq7GGSm8gWltegbbXy_LtRaNGbRsbqNY4mlnsYVqHoc84izoEh9Sehb5kmUuoqvCEkkHntuk4w6ubHLliNsa4cYFMMBZ-YbSYmqFjHe6Rf7e5E3owTKKC1SRsltykQsK0UmyQcZIu0l.c-OQ2YJ2VYxpFkEebkIbiQ Figure 54: HPKE-16-KE JWE Compact Serialization A.19. HPKE-17 { "kty": "AKP", "alg": "HPKE-17", "kid": "QWZdkjasH-qrIlYW1fIk0iqfSMJQBhY4-FbbeIMVErY", "pub": "LTEwJhh9rvh6Qal4SbKkTHws7-RJvpEc8hBzO4BYl2KgEHCEd1LC62EvAAIMhQnJSil24tEh0IMD-JeyDiZ3ugUZ8dmM7Sc-zDc-StiEEiDBdLwNa3JUPjETBvkMcXk9rTjM-Xanl4QdY4oaHzPMv1c7g5eojHiXmWqj4MS-N1Sus7dmVkIsS2TIMsxIpiZWMAOzSmULK1FB6IRplXEyrKBKCshj-yBz45Ku7cwkQXnIZ2NHnjdh7jJfNdqhKgp8GcMej9s0y8MWCWt7phUIZKO3jZh1mvQ1GEqGRgBkQRINISxmlqA2UlyQZkE2w8dxCzzO7Sp3W4dvP5kpCPpDn4V6GphogiPMwogzfESSAGKjWsEIn7I6ECm39cAlMch1ccFB5-XF1ajFnYGVdOeopeUsW6J1yPhkuycXUZlExadrfcyM5Dg3xeKgmuy0w1yiuqXIRauaZ0oiSNoxQ7UfeRWY_aK4ujm2dDG1W5ce81qKZfyqD8HB4LqLUTebMQCCMkZyCgRRK-Mc7FmaRqFx01SIYwg4cvevjzeU2FyvfCqVGHy2lbRzFjdGDet0s-NgAgcsdfI8CUV4XZixA3B-xFaTBHq8OKpaNuFEsyu6fhQUfXxY7Peu4YxPsxKdQwqTJkVn0vYZGTABGyQ-uyWH3qKIqXkPLhMNBHs9DPESRDAcNcNbNgXK7HIFt7mvVzIB-1BGhPRiJDKosalBmRVoVUEq7JQ6AsQRmnRbgHouI_WTIyR8cCaqJWdpjvEOZghynYYL37ohT1cZlnFaRop_GppK-1k0gGqF7vJ_niKy8hhud5WA1LcjzXVE6vCWfunKv8IxjyUWzLsWBqaPmSaeEWUlWvcbJlZTjekMiDwtmqQdgoI33vwslieT__EhbDeEBERTGfJqO2ZP7luPQDTOVegmTVnAWpwWUOGY8VVdbGqADye-Ubt5oaWse3tThpXPXKeOpDNEvHzLy7KF0iIlNEQjYQrN_cQb0tKOMdWeVHqkmqsqNah9lfJXonQSqkerSgV2u0B639yew7gJ4-h2ZFg9WDcTO6Kx46GaA9Mr0MtuUawqqOLBiaW724qTKZiuJTUzkBZ7NKcgdbRy_SwEbbFvA6tbg7KNtaJIJUBZnLySnfSbB6R5lAdTLSlBx_HKUAE6Tcim6_tUJEmGNOyHOfTMFqHCUOoop1Zl7dlbkGVGdLY2eckVqBO6a_k9Scqa3IAQkNBYRlgsBKSKjWSkitF72FadR2wsnZIpbMqY-OWutZgKg7RrfTaMGioYrEuEcRRiCXEHhUBTpaQsWtISmnWF_sZkMkOkKTK_L9MUSmWqnxo5yLt5nWshAQWuVsU7QcIFP6oNnok5ObUL1AithOTFk1mBIKBgMelk58ptXydifTkgTfyeKFl7ffcpf7EpAbgl7gMVPVKAH6iFZNgs5OyDSyUJ-IUjgQSVPxpNr9S82WOAonh8UlBVGtiNUKca3Zx9SbpvDppsTQVdPhox5CUcv0hjF9mqr7qV6AUODCJpmGWJ4QpexiOOyZZ8MRetOSOdpVxviDotR7cTC4W8osYHvEbDo1V-axClLFaA8IBJK7N73tVcj8yoPBCuTGo-6-bAxLgZpRpOhNqDiAeUKoy-8FuCLdd8C8B9Fct-u7A6GbgWw9RwpqFES2BnqQzA-AtYBuF9HChrdOCHs6EmbwE0F0dGmQHGI4aVv4OPBJNjF3EO5LQ8UbQTj-Rt3fEhZ2MlMRVUxvQ_tDfNIwmtXPzIbhI4Q9QX0JVL46YN8pmV7Fw-ChdgEjxFywrB7JpzavacoLEHvtejHlFKLXnGtdLM7yrOBPHECBujbqdvIHfJNauyz2NVvoG7w7nEIZseKrEdPbanEMsGr7QA3mcPDxlMyORSSpsvP4QgUGWuy-JwrISjjyMHuLJJrXTI42fG-6uIQSAugHWOJmMQaXpNPWZDa7RtIThcigaWLhnO9NeX-iYEceKTGnlULLO8nLelaGeTnthdbcw6JhtpteLDMfZFEPs_-6p4NKY8BGi7k8ICggtrk9ywo-qo2jPLSHFtkJdYuqHz5Gdm3331wMfI-spQk4JNFy1der3YZkwP8TU", "priv": "I1v-IPJPcDMw2xO4rcknLwMM89dk7Yto68XITmRf7YCQ5R99pM_cm0NLKf_zSzrd55rQEKk5KED1Mv3NBtxkJw" } Figure 55: HPKE-17 Private JWK { "protected": "eyJhbGciOiJIUEtFLTE3Iiwia2lkIjoiUVdaZGtqYXNILXFySWxZVzFmSWswaXFmU01KUUJoWTQtRmJiZUlNVkVyWSJ9", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "encrypted_key": "jySECvTTwfiXW2mYkfNqqe9IlvNYzSSeiZ5CgXV7Zt5pFDGjdiDFDQ09IeaUnDtfCMx51sK58dwNv3cFCp9dBi-kdAynCutCnd90LS6aYBtvxqwdWMmsfTFQGheJDnrVYBqdE5K6zN2fxo8BYXeD-np61KxQPqhPyoOGEJ7Vt2QCAlFoIzPnBAW5bsUfUX1fmp30Kv61KWfS7Z9oIs48WnGqZbcxzVicwmV9rgFwOQHbEBgVyIMZdLKIpjxWDkd08x6lxn_ay2yXvEQ0Qc_jePb9aw6QQ4K8MrzK1IxphPrLvz_xYAi-UwZezAEViOLtNha8BeqvjUcpYprXsHaIals2SrOvo_H9i2K817hrYTDkuEp0YHMCYDY-dKKvyBeyYbb9XXxCtARYUEqWU7kw0i-6oTesuV8zC4g4Eu_S3xj39F4jrf0n7W7VWilVJWXp-4ibVyRA8mmwerbLte4wafceKh8KwS05m0oWRnQB4qlIXiHFOQfD3wOGK0qKEPiBJC9qXyPpFXnabBjLWtBazvWJd2bapZljKYMMk3yiQhFH_DmS2dD8X_Nb9Qta_v2MA392GUUyFBF8P8_8-hUauzc8HhiTv_vtqLg2nDiMP1icRHqM5NtrJSsmeVhHt-Y1V4BHAolEsu0RSiarFR6Lz_vBAmeJ4bpfJ_8k2c8Aj-yc2Yn9ZTQuFNXl1tTRIjJjuDcBfdna4doMcJU5qqxpDy2SfByB0DoUiIV1o5LvdnnDpWHxxcn0a2G0B8vz3khwc28-bnzJpP1oZx-EGYNMYEd99RPj6iJx92S3SjpTdx3Q3JLaMppXHE1PzOOTI_3nQqW9tdmxSLj1zDgwxh4IpsK0N695vODOixnAjlg5P7n76G2dDCRGn-ylvwodhhpvrUjs5EwTmkzdDXk4f21E86PCVTVEFz-Oi4ifVrYLLyRcBHm5b-TrOLunQooiQN9w6OPifNKWm1NIiEJcRJWA5fCopFA7YNQVy-FqXIAMMBfGvVttqAyK_yEpHQlu5w8tsbcBTsgXsY2ve1Ah5aLpAylu5lliXbtGK_3b-hxjy-QiF-n3WfnJUdSyTv7icdngBFZ9HkWvzgmISfkPSyIAn2Jl9iGlA0ud8PALoBjRQcO7Q9rc9ppOAhhzn7hxFmCFuACEu07Wrog-wbZNko_23uf8DymkT5LDaYmmvjTeN_0sPzjzf41iRBL1PdMaVQsBZAR3cXAQ1hpuGiymt9BgRIr1gQeItRQ64Fhy6OnIk3WDYQiDjKWKNuc6gk36iVQ28upKg2ExMwSM3eSY1bjzhglZaMitRDWGuXuwROyNW2WZORO6b0bZvDpWaCaQ4d3RFvpq5cdfUf8XiPGfn4RIIZcxkTrrQZIbX8iCGVlflzmXKYMmAFQiRkHll85Axv0ZieXwj_SX9ZsT-TCqad59iqMR4j6pjME2WWSgaJk6WrMwKR7dQNq_t7Fl9MewHKdYnlPlQx18KbvCP0vNTJzRqhyEoERuUkInhgWF0HeTXXy9mkLZ9Yp7td6jLLOwEvKL9r1Bi4Y2ta4_VFOHoE5MpgAoA-z9twNPbh7F53glT1QR1vDFBubzF66vipUZW1qDrdqXpvvxNP9w2YdGzOUPUpTO4LxkEz1rxoeqmU-7rDUhmltuMYvxly6ppAIpTTXTbvfPGxMB2AtHzqRBaBFCoTWMjGfaVVQt98w0vaFUfm1gyGPOcH4Dh2iMgS_98lGUDmmuFWP7m-fFEsjH79k4eWTvto71qLBjZLemgB4A1lbOu6ut2jcSaVcNv8I1stNJCEX5zwGKrPDiE6LGRWvG2PT27OL8VpBk7n1vhp1TJPbM7OhDoP5lSELpGiiIXN6ox4n0lHPP88_SBupev-fmLEe1e5-o1X94nd4jRz1o_f4pjN0iIHOcF1MhOrYPlFfdOMBD7bPtVTU7M2YrXc1_Gq98CTsJpdmh9ELUvf-V71dZodiMmj9H8CrbRfH7pBDgsZ3J65hgvlTSJYKhpVnT8yh2qgqfyd25YIwo1xRTDITK_Wd99jnkFrdepJoSsGfsMcl8HdJ0RLh3GxUsaHeIVb-a_7evRkOA6FTju0aCHU4", "ciphertext": "NpGyuCe7oy8GbDqnKCHFJ7iN8ABTE9BEILnTKt9jVVomuxSGq-VVuym7sso_bL_KPbLlnm6YcrfBr087oNAX47zvooXJHjt6Gafwpj8qcTHOxXv0iisMYqFL0CbnWmCp92KYu76J_4EUbpcnNhW-RxllZrycMmbNM6Cjjirn3nbwDFE50hV_Xho4N7GBuUxl_cOL_PJYebtQz4cz6j4FeZkaeeZXkqQs3v1LCbETcfwKWsQEIpKd6sBSKEimV-eeLmyqaSRFt8Kgh9y7FibUX_BvYXIK-z5FSnUpg8EL94QHuEvjt0WxhzObaN5W49pNQ71JKlkCeI0bXbeMkroDWUw6X8t94IEkV9Ac9LHmOf2T3SL2YYed1BMgHMObvpWDzg" } Figure 56: HPKE-17 Flattened JWE JSON Serialization eyJhbGciOiJIUEtFLTE3Iiwia2lkIjoiUVdaZGtqYXNILXFySWxZVzFmSWswaXFmU01KUUJoWTQtRmJiZUlNVkVyWSJ9.3iLs6N4egds_CZl-d-0Mt76d0ErYtpSV0Qu8HTPQLvmyoU1yyyF5M55bv2RzuFueVdLENXcHqwAsEVofAH-U8LlujEKijzd9NObtDFlkUl5P97WyoyMMSQ0CXom-frHR0xve1hijlA1Vtdwgs9uQyzZvH1tUih3KmNpkM0QlcT8xQpD3Ro5wLzNTDVwFkjf3Sv2aZpg0mj7DnHUBYqML1B4IlbjyVmGRbPMMH1ZL-uV5pLNvS2WBbQIIwD0-vRLSWak3Qdam-dCRXuCqIEp6E4VlURlvvteQIMmxTSMS3BGuLwwFkIgtavEYR9JbO9Fhny-im4LPiuaAiqHK5upGzKZ9IeRg7Biqzl4hgAIwGDQiZBJdAQ0-sEQYn0oH6D1hmMPExVgC3EDQlbvrtTjbZUD1ycWlUtYaigHn-zrY0_ovfTFBR3_1RFw4MhvtII259t3MVCoirMhmCBnbQuiCutbU3DonOlb3SRP7p4h8s8JeKugeLrSPYG_ynikcClgESl_oYu26sC-um0j5vm1Ltr5bY2wUE1RAZgEIy345bhaXabxlPo5s1KviPge1thsy7Os2cAcaeqyjPvSmyBpuNHpp4PtgOurA1DYKVKOIc6VoOuLzUeVfnr5VEt8_0uAJbRHgIM7-lCvN5yzhGj2TMhFtxcgfmYzsk7C-jPbJ0JwOWEYAUcwesqLVg89kRkBWz30ATy8uQ8NPqz7MhR6Tkj6VPu2YPk6Y-RKtBvuuSNXeVOUfo-oelFlnOA2POoDnz_0Zr2OA06HYOzhMc7yaSt2zNh7icYIeZ6qG_97G9oObocl06PTDDX8iEsLcIJPDInXP3UZWMpT_mzqvlpy6sC5rko87pX2e6FqAViTnxlbIaEM35Dxb2LiKR2zmQTGw6bYlKtTurEJWku-H59n9aFM2EVp1jIH4AbsGHJdpi6LeK3P4RIQ3yhaNSzgdc7JSqKpnf8QAZYtIPJy2xLfzZ3YVqUrcYdlQpj6Ez2SOsvaa_pqM5sMbwpx5YcgD3kAIpVAu3ZlDz4EoZdCW8WJuzhWmQPLRrRR-MMiIKjwqJtY-s43YGrPgru6MmOb1aSE2OiJh5RyF9PIEagMsWhfMMtGbfMaTLCPMu_EITMbdwW1qcP3Wi0bimOQb2gbbUWYxdKKNeYhPZgBOxW1ng-adQ9KbxsQuXcH-mObn74D_CI5QO1icAFcM6W-nJJZ1lq9ldD9VrO78AVrDR3oysIattMiSR-ywp4swJQ2pSSOr6EclxksVycr5tmAjH0gct_zCb97pebZzi2dD8Sd5t6gkUi_qEi_FnQPwqj7kcaC2VyI4oIWsgGO_oI-iqyAHlA-ERXUB3vcrR1IhJ70Vv3Bz6OuNyDFWkH3FGr9WuIzr-_l4FPq1KZXZsUAeX6mKvVaKNraeGgkYlWv4e-I7Q3Fuuj6M2iX9KORpJVjC9FOnMuVRZkWVLacBoS-Z-t1MsHNYURWWYPj-4ZvrdJKnIJSG3LlV-taCcw4IKNHeMhU-PkpVcFhNUEOML_eRwm_UVsAelxtNM0zN4qyLSShvSrEWAaWc8c2jzzcGrIjlzJTQt7WxBYOZQrO8sqLpGlK_ieaffcm0FEQX4HmJs1896ndrCNkjbvNWSCqbLuXxeiHdwk6KKvxNnNKFaxAHqTrym4UROngVB06_oqIRPdhcQRYKcMvX0hedM7s_AU3C6SwoZjJLUL_5cnBnEOyJV1Mf5JKAbnof_Uz4e1kjUkBZd2slc2c7enxl-0kp5SQWoFHpuTMd6VM1LX7lEubps2XwRZMh7U4RppNcnGVsfHkQ_GoEaVrPeuH8XyMHxh_qzGOvbstt6gLh2iRYeb91PoxpOw_BIBTp-_n36uGLSjUELyOwXkp2gmvcf6hkwImunHL1VZrH4CORWD1Av6_1jWxpP_glHtoJ3CuAkxCg-D2lBze2FAJefsbIi_oWAt3EXA_Vxm4CKYzvtZDcgQklQI2knSI5qq-W3I0mgsROEDJ1bo5VLyUVURDL1TljScmuE4HDf7n4wpGGPMEPdtTuQwhD0jghfUsKkCYoxHWlhnzvhGWS7CIW7FJOZaAt2leXfVWAtFY..xT0jK9-UAy7iiTnBKyPGUrWVvJCO1d6OhvZpy7AnTnEnQmPsv7k7LgNPMvfbbKT4Q1n7cVgTpXcQhclLtYd3_S0PpSbgeAAJA99ty1UIBYd1SSNMX3fWRboS2UXziAm6clXDPWPVuf5DaqsnzSsC1WFLoLXSgl8NMo6rnST9eu0b-cSOp766f5e2sry7P37TeD6on7f3Z84SVBsJp4Zv76pf1KKAK-43cebvBklP0v6AawtsBdEg3GYKN8weoiWh_lK3nhyhAbfNb3GTVTIlBdpDi3Kjb0r8j0hLOQEIIH3AYPdSiqyOVqLELTV2Cj4r8AKLRpCcstg5s54WSUTDgyW1DT1cI2XiEEXn3lfUmozXWK2QrWwODaGsLTGOq23K8g. Skokan & Campbell Expires 12 August 2026 [Page 26] Internet-Draft JOSE HPKE PQ February 2026 Figure 57: HPKE-17 JWE Compact Serialization A.20. HPKE-17-KE { "kty": "AKP", "alg": "HPKE-17-KE", "kid": "ScO5bGaDpICDY2GH0-AgPOdiiBZ64b3GMYgK_DCipW8", "pub": "w0BJS-I7K6edZlsmZ6QLO5uejlBh3qa0GjVQnhygRiaJ9PJR8jECQYlMCKK72jVVzIK0fQevfnKZkkFp7kiPoLbMmmBjouGPEmjDgfMJTOCeKpyewrlX_Ahc0KaYwvM1E5pscjYRrQwoq8YO0HlzCdWpUTCwaehoX1kXm-gVSmhBReN6OPfL0vWE7NKxifEmVGLPW-aoyBTB1sUzVARZCTesM4cNrRNfA4aY7Ce1DzQ5qpZBrHVsf6ODu4kC7ddbVaOvueqBwbAg5BZ-oWRSauqHczrG_JWb2YJ00EoTrsRZ0GMr4LczqFk0XPTOJSweoAFeniRmBitmzGyRjwDO1zavG_ibZua4BHvMPygVqTQR83xY3vFbhKpMOMyec1QyyNJsnqpmowVSi0A0P0tGcPx3PHUfQ4c_LpjJiIeXPTQqWNlt2OfLqAMG9-GiJ8WmdwXOYfglpDS5oRLJ_GmB3shHxpOzrno7_eq3dsKpKrB0oZdoLNlVRWBiSBdal6FaCWKD98R9m6koxFw9jVFOF5IcYSm3sPC4aXpcxClfWRZIttYT2UReLKemckNij9zGFfEM68u7C5fM8HYvKQTOP5MrFEdMxteIYVOt9JJmaYCNXApMOHG3SLYq7cWVRJdIgDaxL_W9_BNW9ZyYfnh6PxzAW_ZimxYgj3p7_twlJGNG8PM0zKRtJ9G2Igm1Y6qHXlxTM0dMFWo1VETEdmmgJxIMstG17vw_gjtmKnw69KHGZ0IjrpAeUNgQekVjotQXCqinbMjLaqAHCiButOUIS5IXG9JvdwIeuFeRnjlwj9mdY0KQp4AByAGBl1Mc2nof57KhZIRUrMEMpQpMuSCkfsRfv2JFIJQ6bqyneUVcjYRKOFcCiOBCPrF8wcd6zDvHbDd9JUU3wZIvjlp_4oFy7ptaRGkLotqXqyoC86FvgXJs-gBLUgpam_bDgoeaDMYxERG6jEZPF5WnyagKdtzIBFlJURknJtvK86U1Cqi3qQM37zOoOYhe3AQpDAsb3QVNxOlGavt3J2kwi0lbp1YQa3gO1MJi_KEYQgkWTDWT_YdoC3w8IvsbFDCpsShfp-VIFXYV_AuOv0NY2DmPg6OQpvwQ8McFrek_XfWGBvEPcnzLAkdaXSaZgNcY9YNC7zIwkBSEI2EeE-MTCBQDVSCm5mYBYBQgoTWsOSmG3Ow4dRqANzKbhbKLHVZIeIUdYfRVY8wVU5EHLIEue4RIJJJH4Zh88AyvdBhP5nqUvUObQBhzTrMWeqVlccUVuVsghNZl5rUJpudtFlRgLUYC-jGAW6ozgUuTCjqSbJR1WjF1zzdbspaT0rotuOddEhguXfmMPCsTosidjhiwN3ZkTrx5cSCIj8Y-9QrD_SFtULcHf7s7U2NwSuHH5EMaoRiXv7UpgbZD8Xt49aZtdXuCpWxIfYI8pyAG57eogQMhg1wj9cVc67pvvbVn4kFv0hCSEiZRbek5ZYadXcJUOgSZFdAAlAxSq2wgrZlG0_QaU-A2_By3HRA9bVvEsjxz-RaSNZFjubynj3sql-ZxKNkW0IqF-Vs-7uZIzNgOK8aV1ZwCWzCHdkIzMykoVCW-CRPLm7TGZitlQgtVu5Fs6gs5UnSem_lcnGA52QpwK3s7X8bMFTBJ7cUDznh7_Cky41DA3qDPp1BW4hSKZ7hK_vgNeVURwvBP7GdweHs5K6TOJAyje5pU9ATEF_q_caVUZ4l_OhZg9Ed8otB-FEJC85W7Oqy4o9cFJaOBuqUZmZXGt9NqQCEZQJVI2ToNpUVKHVZqaGKKU4zOLGbK6FxU74zPQQYpfElevAdPrWYJk_wKxgpuVJggqKm_w5IOyhwavbUJVWJS9tiw3va-Z_bLPAW0_tm3afYw1JvBDxeLlNnIOGxPJChVQmMg2VBdIPc2fYhwvmGwmlN4q9Ca8zcZ2qtWHwVYgJQ3A7gGH1g48lk0UklMvxllt7kTwue7CmscRkgGcEHHo5wTyaacsEc8LumQn5J1BiUpptKtRmWAGuGrFcq407Ro27s5PUSJCum-LBEQbIKASXubtSvP6wrgowcNp3nga7FFJ6mCZDU6hlZEmyLLSHk", "priv": "wuj6hhHH-LFGeeNM1F5RBG35DVA6WD7wBwMw9KwvPRtaS0XEDDIPp4gP9cpp9BjaqlwLvEKhZR2sXlJYD95fBg" } Figure 58: HPKE-17-KE Private JWK { "protected": "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", "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc", "iv": "ie1uRIh1QAjzBCMP", "ciphertext": "BQyNsRtSyKye3PchLTA-F57QxBKPz0ybfT4OjErHPVgw_YhXq8E1cf0Ic5X4U0AYRDiPkM-oiPI9cH5de3yMyp7HpE63vJFon0NcmQIW_PfaKYwHLC-lMCfWak0G7KknHrgJVdxJEcM32xNY1Jdt169ALYhXuX0zsoQXXLGjMAkqx2KYg3i3V8LR-bOkvtDNvmD76ERksJyxlRQ9WlWV3YIwdNI51Ukb7W3OkB-Ru8SgmNgFxl6v3qhVHcxSaCom8d7mvUzL39ZFAEJ4Ptym-RBTeFnN-JSC-h7daY8YgvXJ8KN43qz5xjmNlS3N7_lYihQcFYoctLx3i2uKol5DtsAXBuzXnP0FwfNc3D6pf_mH", "tag": "MoT1JqpZDCUTTO_E5gvVGA", "encrypted_key": "T7l2Fu6qI82x4z2D-C8Yr3X9tnenDn3Dn-fECMFHyyepjgST8-V6g90R4J5UXPOV" } Figure 59: HPKE-17-KE Flattened JWE JSON Serialization 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.cqktZbmzNM6suR35Fo58t8TX1Va2coa3nBew_9zPYCN4U7U3OBJSVBp9xzkHyWjb.vLZG2Bhl70LQ3Czq.HKHHAMX9ZCDFDWlAFDAS6v1F8kGa87Z_fOMEom-i7RsJ78egA4v7KRjRW6khjBQe6shQyaBwsfUi8q1gmf7KAkVBL3KmqspIkr6hB5rXyXhqRx4qnDdABMGguqjT7f0d-vdI8L7sbqyMZIS8bq-NFQcPVX1ZCl0-8Mf6-W3KIYFro14-baQ5Xm_voWGvqnv4-GPbpQOBuhWiVobwbeIZnSKZyv389WCuDP9FvsmH26_rdPjHPw_rKe1gFUp_DnGsvgbwPYLE-rMCQC6X6TYBxG2uYJxizx2ZRVBQFFObQE9hF7CFZqEQYXYXtNvDIKeLX6l9yjxLl7ex51i7LmeK_BElee7HyAjN6GIXYCErQTXn.b2q_tDZNhXze_1JIv9ZQew Figure 60: HPKE-17-KE JWE Compact Serialization Acknowledgments TODO acknowledge. Document History draft-skokan-jose-hpke-pq-pqt-03 * Clarified "hybrid" terminology disambiguation in the Introduction * Added descriptive text to Key Encryption algorithm sections * Expanded Security Considerations with ML-KEM-512 omission rationale draft-skokan-jose-hpke-pq-pqt-02 * Added Test Vectors appendix Skokan & Campbell Expires 12 August 2026 [Page 27] Internet-Draft JOSE HPKE PQ February 2026 draft-skokan-jose-hpke-pq-pqt-01 * Added example JWK representations draft-skokan-jose-hpke-pq-pqt-00 * Initial draft Authors' Addresses Filip Skokan Okta Email: panva.ip@gmail.com Brian Campbell Ping Identity Email: bcampbell@pingidentity.com Skokan & Campbell Expires 12 August 2026 [Page 28]