Internet-Draft JOSE HPKE PQ March 2026
Skokan & Campbell Expires 7 September 2026 [Page]
Workgroup:
Javascript Object Signing and Encryption
Internet-Draft:
draft-skokan-jose-hpke-pq-pqt-latest
Published:
Intended Status:
Standards Track
Expires:
Authors:
F. Skokan
Okta
B. Campbell
Ping Identity

JOSE HPKE PQ & PQ/T Algorithm Registrations

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/draft-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/draft-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/.

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 7 September 2026.

▲

Table of Contents

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).

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:

Table 1: PQ/T Hybrid Integrated Encryption Algorithms
"alg" value HPKE KEM HPKE KDF HPKE AEAD
HPKE-8 MLKEM768-P256 (0x0050) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-9 MLKEM768-P256 (0x0050) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)
HPKE-10 MLKEM768-X25519 (0x647a) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-11 MLKEM768-X25519 (0x647a) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)
HPKE-12 MLKEM1024-P384 (0x0051) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-13 MLKEM1024-P384 (0x0051) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)

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:

Table 2: Pure PQ Integrated Encryption Algorithms
"alg" value HPKE KEM HPKE KDF HPKE AEAD
HPKE-14 ML-KEM-768 (0x0041) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-15 ML-KEM-768 (0x0041) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)
HPKE-16 ML-KEM-1024 (0x0042) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-17 ML-KEM-1024 (0x0042) SHAKE256 (0x0011) ChaCha20Poly1305 (0x0003)

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:

Table 3: PQ/T Hybrid Key Encryption Algorithms
"alg" value HPKE KEM HPKE KDF HPKE AEAD
HPKE-8-KE MLKEM768-P256 (0x0050) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-10-KE MLKEM768-X25519 (0x647a) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-12-KE MLKEM1024-P384 (0x0051) SHAKE256 (0x0011) AES-256-GCM (0x0002)

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:

Table 4: Pure PQ Key Encryption Algorithms
"alg" value HPKE KEM HPKE KDF HPKE AEAD
HPKE-14-KE ML-KEM-768 (0x0041) SHAKE256 (0x0011) AES-256-GCM (0x0002)
HPKE-16-KE ML-KEM-1024 (0x0042) SHAKE256 (0x0011) AES-256-GCM (0x0002)

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.

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

  • 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-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]

6.1.5. HPKE-10-KE

  • Algorithm Name: HPKE-10-KE

  • 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]

6.1.6. 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]

6.1.7. 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]

6.1.8. 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]

6.1.9. 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

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.10. 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]

6.1.11. 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

  • Specification Document(s): Table 4 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.12. 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]

6.1.13. 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

  • Change Controller: IETF

  • Specification Document(s): Table 2 of this document

  • Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]

6.1.14. 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]

6.1.15. 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]

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, , <https://datatracker.ietf.org/doc/html/draft-ietf-cose-dilithium-11>.
[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-04, , <https://datatracker.ietf.org/doc/html/draft-ietf-hpke-pq-04>.
[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-16, , <https://datatracker.ietf.org/doc/html/draft-ietf-jose-hpke-encrypt-16>.
[RFC2119]
Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, , <https://www.rfc-editor.org/rfc/rfc2119>.
[RFC8174]
Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, , <https://www.rfc-editor.org/rfc/rfc8174>.

7.2. Informative References

[RFC7518]
Jones, M., "JSON Web Algorithms (JWA)", RFC 7518, DOI 10.17487/RFC7518, , <https://www.rfc-editor.org/rfc/rfc7518>.

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": "W2JrGUxnjPub-iNB_ulAXI2OVXqlZLCcXtz5BIcOg6usx75fvJxk071ushJ98KK53p8BIxbMLQ519bhaKR9FpRPg2cp6c7NVkMRs4_4D434XsSk978DVhJJ3EX9mrUOen9Nl-JlxSOyC_BdAe28eVxaVXhP6LNNwARE-060o8HAHc4CaEBXSyL7qDTfdvj2rM8mfYnwY595iZsZIyaCBo_TjfO5XsroBqklrYscgZ1n5pEfRe8PtILonjREHjNIvJ-kAZiW6BJK7jPLRK8wPL5APzYgdmVp_7yC4Hc3kviUX6Fb72o_Qi5h8vHpKZVx-kyqqpaE5o-ntCCrDk4RnVh5ufD9KslLmSPFjfNylUJvSn8YBOFEW0mkRzhtmtvlQM57uPg-6WNTXSfnYlRtXpE5GEN_LEg7k3y9aVwkmDd5fXecczCnc3XkxS3_I9uPl3VNas8eCZK2dA8cgHDtt6_jdHXoNfEm1_SAjf8iK4v6HWJHwLjpnpQe-KKMaNky2_cOPnxWiJ5jtBUb69CmixFGWFwbFcjI59b7UgrWYz-bWnt-WRiou_3jrtm_mcxcBMq8LnSzj6zTVpysq1AKcuwj5iobklObo5ePt-97eKyZF5RTgQCcKqXqxg5y938aWtzpB4h4hCUjZtt7GaOAS2cyXxzX5DDOzbd9RFEhPDt3AY0KYA_Yr3ZhB_1omzGGajIJPnM43ecxO4nojTl52fxoAP89RG463bP_20rxjCESIt7es3tp_PxYbmRmdH4VIJwLXy9vKP7T7sEpARew7u7gffFG-Bx9L5h_wPa3vRSJW_2fZ1LeP-VqHOgOifJihxeF4XPMPkbhxIkATK14ekPWQFChAEyKGrGMOyA8CIzFIOkjOuCYy9hQrZF-w112z8-P_evvtb-PI5BJrVPbby82-FfEbIuoiyvBUiDCu6Pq9c8NH3FjMBmZ731tAmo-nSg75wyhRttXmVuJiLISh2en9S5kcfW0JvdAzC6jujb01c-LF70Ppf527Xt8Esgxmomr1K6qP1uzEqwN-ZPM1gUAjN8F40Eufh5nBYihqut7XfdSP5b3IzHJc079rSOpqlD970S9TIaP_4ey9M9_2-0nLvj1M0ebrndTbjhCYoicNYVO7nte-zr8qr3YQUlbHOMP_QQWlScy9KT0KedH-rTg6bKCXkFlIlIFNATJKdri83P3hj0S2z-XLBN2SISe0O-J1kfctlLFSd4Tk5ulcP_JPLq1fCM3pNg8YRQXDE5aZYZ7GNHFuMf930dVPtRQnNivdHCpc855222hXLIjyPmWUyXcuD1sYzUB8-cpZRvkq6o3yqTTh-YlAo9ZY-fqOdL_uYwiGsU7You9h733n2UePSW8aild19rBVI4O5UtlmByoRd2RKQ-RkN-PDVuAM-Z5c2EukM9Nyt2IZzxhYyCvpdjolcr-4Zsn8-YOE_FAEB9edzKN9Bpo8P2BDE60QQFXj9rz40BlIkxgeRl3b-S9yFhCteV0IpTuD7ft3elLx1D9KxIROAglHnrnCmXhzpA",
  "ciphertext": "M5VOUmhzkR_nX-07uj7KW0eOTyQu8ilZxu1AibLda95xsoRQo7PVi37u1LafSMqNNKlFoUTWxAolrGkQO1IIbh55p_BGa1yvDynC5PFrjMDNoP1jQHukn2kvxHXAGQOg5Wv4V2NkQzZ5a0vFMgWGdkCbPe5zyE5yGfIv8-Us6fJlvgQQ26PuoGCMugpPnP6ElVsGGK7KT9dMa46tXNCnSB1QB0GXSNxvVkSzEIjqyjGXJH1AKiNuYRFrAP3lNuJKwLU8iZ-yTMkmDEu-gpdL2p-7L6GpUQ7YL_DON4E6YkRBjTNqxK70XQBscrwoYF8Ih3nLghNV_e1IGHwe5RtsrgkKA4946GFNxVWQJvqJZbkTDEePc-5Lc_iPd5l1fZYqnQ"
}
Figure 2: HPKE-8 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTgiLCJraWQiOiJEbU9XUWktVndyalpXak82bVFRV2R2M0NKX3Y5a19QSDN2UzdTMHhvYWg4In0.CZHttG3K0KDcGOAi4g_6BScIv77YKgb3tv9_nEBfHPQdx9qABu_FYPVAbajqQJrhq6tF4PIUhCBzhlVsa7HCOd2KgBORUmFrS1dbwYlUU9YdiUOi-dH6D7uKDpdQHPQGnlpWUVMqicungFvsvh0qpgogo3AkgZ30n16r5JZfD8ZE6tFkDRRBizqbAr7ObZ6hm-7fdGLPh65mX2WuxRQgiP2C4tmRuU0aTztDa-9F0MBaVBW1TV3n_eErTms3_ye_9yE3WCtlONOy8yDksP8lpKyyYOwfRNe3wmSA9Nauq-7fY-ShQO6q1M4r9K5PHy5lqNhlM-8C8vN1Lf89BeCxNA9dzJfgv2TeItMcvfnqp79gx49ohmQ-hceehDFOxjATelP3ET1zaoIrnCJ9-wURXRwSC75JzQQCmhq1ZTG9M0Tf6W35Q4yilNeNiYjsgMDkaPgpejR2xqXcsoVwD5OoFf56LQ9rJFKAS3-RrssLvXsYncpmIFfXRWXYTXvKk_jsNstryZUoVU0WAZOc_BDPdN3omoWZsTE1Oa2cpICkCxBvtx_Fgy23huwTvqJ9OwFIAAJOwz3pP0wje0fyitN1MN-qDaFRRSZIwKPavBsxtHlNYU1st-7uTnWj3bmJAMRsYmj5-b1ZR6vwTLZPh7gk-LSY8DdsGmEwWX5-v38zWiJ6M5wIiwP22p_vykhH7IFn8FC4BH0UMd50RLiytzGGnRRNa2nj3fzqALxfcEW_YQX9Gn1TGn1wtwWhZK0_zVSGe75sL-0Puuvepb17-FVtcody8FJns3yqgnVzHdD-BL533UsL2JO3muzibeIsq471zdHQbgLD_Y446B9XFKsi7UB-9Ia7tIjlZTeSFLToIjgVNZDTRIHW0DAvQl6tsn9XBP1YaSoERlwkR9Os6qDKSCu-T_-oWh2bUqeGHZlP8c8lWcjxAlQSnqqEK0cWBqcB-VR8TjM2RoYHhJGnfbm4W67b5Hz2g-TgzODKqu-Oq4iWQA9yobfQZ0n1Y25ZYuZ5Kykg6fzqavDNqj3A5GX610GFi-6f9zGYuvea3R2tZpULZKT3sW2TZBASiOTImfcbcPF3mu1V5iHYHf5_Bgop1UsDpYd3IOGCMbNOSAT4PdGyzweXxP_Q8622SVaZBhV1lENreG-jW3M3GseppXKyDbs-PKbWQYRL5keARQdizd94SuGCa1sCnOzU3Zy1lztZipVEmHcCuXnu_skzYR81bWRARKrizqqei5oi_SH3Hf3uB98KwHv-9w2aF0cHpG2wRAwVOf25wyYpBXqyEfmv3bw5DiNdojpUYch6EIOhNoT-zEGMVmyGZpgoCw2JNc_9tSI-t6PT_6K9n1O1YgYUkMYALSu3AXiENB6zSmzzBxB7Pzhz6ANAh2H1SeyeTPv4EPedZqfu_hwg6pBAb4Iam4OJp49wDorHZInfq6cFPx0EkT-PRSdJfnvbga_ojY46_-Ul6SPNc_BuKUheCjWcLCSwbRsVvUbux79yKtqCRYyuPCj8RwiUa7XJfStRji5fzA..xtFUM8A1Zu4a3Rwcllhc1FlEyWsDe2yN8w4sD5MgmAQgOLdUVkJSn9BgIwTJlR468p5AcsTmq-JSJbxLdQPluovPScl1pTBziun9YqDcNPgaHSbmqG_iGfntfeFStRhgP8aZfuN52ZGrwxkf-5dLPgPcWvx-kmjZ5fmGC7iu6IcpOUce2KJjUTLjhc_1_2f1mnpR1N44U2jkyNcXALFeY7RcJq_TuyDnNbWB8f042JHuE8zJ0QI_CznORs5IUaz_YoJXMLhx-yN1cja3SCllqcYADa_n62D7Nr_LWmbkkiatXbNEebTOevXdUanWyCJ1AszVfAs8W1Ln0WAQ8Z7-SsGceQ7uuA3ZK_OuXShvlxRl7KhF3rJ8f7jrowCww669Bg.
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 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "sU4NuX_rssZtqgHl",
  "ciphertext": "7kMvPDr-PfbffE1cNsMxPTb7cUijpeKuGtF7ugB0ZMqu3r4TBFBkIT1Bg4I622djbPLQsX5FIN2-BrITOuj1w06j1gLKhvCzQrMjHJdKWjNWfeTfOqyiCk660FYDdgcZHere2ozGbPmkgQPkFZoKAnGT8xOLwvmKbZ0HIDqOprcnU2cfVUP_RQXCxNdxse8izMdLu7CXjuXFJQrMiTUDW8JQN3t8DtADG-xnFWgB3MYCqqIF-QWk7lgj5gsFCYgAiGqucPwl9zurM0PdTSyDigKkvcN867s34lu9_VNyjblzq5FkpU7zFwLYB41sXGe3OuciIEjcVy279Tiou97dtMoZdtkRlwj4INMRrETW7NQE",
  "tag": "ifqSLLIgi98-HCqQHaFF3Q",
  "encrypted_key": "TL1KYiwVtm1xzhFvz4YnFhJVprny08kkbfkjKSLTCQF04iRgmhcpXw7rQHTprMcY"
}
Figure 5: HPKE-8-KE Flattened JWE JSON Serialization 
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.3OO_YXmUnW3aLhcW_IZJ3Dkv2UiSVu2sQ4Xdq5fjA1Si7mGoVhIiuERkOecRONAL.dOQX_7kDmWzDUqY3.DeIKORSLr7-JHPM7o6L7hX0GYY57Jqd8KishiIig_QpNMHP5trHakxU3Vk-bmFFIDBNf1zMPzXZjM3cKl27NsbTQr47F3kNmLRS72aAM8wXm5nbu1oKz4hJrtBd1qfUkZdZf-tKBQPTFaN3AHf2T29QaupeaS72hwpLw-WezzTEKdKkHHM9enU-8XkywIXGxqYoLQH53QaA4xWjYK7T2Vy7ULQSxq213LScy7AGrHmOcG3-nu-tQfQLyRalajDd04ewABWWIMXqn3U2sJvM9DbBQsbZbB0tsvBku7PXlP4Lpxo4_etrmW2eCP_jqHhlkmzR_41Y5hesLUoeCrEpE8NsXQjZ8CC6Jj4r61nYPK2pr.JCtczl7B0VklBgEZEw0_Aw
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": "8JWI41ywX71ALIaq97BPe_Yg9pjYNVExLJp_dvfBRxYjuWf-Xtr2KB6lc3fzEcnpsRSmaeQcgfjdQDbtPCX8JYyFI8JlJ3zCKVLCz8OtGdBeMGqKtbV5ujhrsvDRo3U9tUgdoxvELHpCk5kNA21cXHICnKbayPDOWAuZlilHYFzDepZtBw7uB51iQa5f42J9JGNFoH09WoksHBuJ5LCwWRJM0uqVqYyu1sMauSNiyBI-C3FcaNVFQ0mGl1HQqa66lgYpjJ36NB9svyvIBRuBK9I5aKSQvTITyEJDbbYe2RSzXcxraFdg-HVyB_j1D1lFmETQyByIiVU-2-EO_Pe23AmB5lkchoBiMR1iHWBe4e1qu6ihPH_KqCRfNjif57l2ClbI-ySKp1uj047aVGZSg0eRiA2qCviOF48OYFzD9RMvxbexp7kWl23W_aJMHDHU6FcpdMkfXmlAMpu7p-Ln97YqfrhgSCUpLRVggNYtYUcr4_x3kPcfvVSqd3NjiYOg7H9wIHaf40th9ONmZOUxeCtHA1RRg-PZ8i0YKmWuHICmwHhDAIvMeFtGrRe9qKgcQRZFsZgQe5xAx3kDCYqDh1cGQPmJZOOYH1TG0M4KfvRmK3rl3LqXk7o9GDIfjpOEjqtgrC9kiEApOxzevJZS2ex13hZU8WLSruirMa5_NTbmrjQOCPERQ3sm9UikP9MwIAUkhMd1A-Jwryrr_PXEmc0ypvZHm4Malm_uCxzSSg_b09gDFtWYsfKVKbDNBZBLXPXHae0NshQEQfwrw0beUsBfSuiTzYdeTBsEgOVGUyfFsZNhk-8Ok3BghRh-SabY9CEXgjjhTPPW__s6LILgzd08L1QfbGEHwe5zapQOtLkvSlZkPSS4Ef9IXzpeRGvL5s_ekThQqBqrwV29rymixJ5J4Ey2xtz5Is3lK5KGYvf3_edZ-eEcKf6vDkPjAQAqoBOYSWsmxDhogp2y9p-j5b9VG8sDurd5MCde_BHusXQlR9pwJDRoPtL2et9IDNq6Na7MiUDgmcg4Kz56ZIdNbiA217CirE6lpkzPQF54Hk7iUHjsMkL7yCQKnRC3Rt_Jvr5kSR5CB-Q47wXC6D4KtFdYXw4uYN9LexZgN3mgMA38rFPgo0CkE3Le3OREiXzg5185yHtJyTqzEtvgT4mKzPqyuP6-rUNliDH1weCKX7VxJRUdvyZpnyFjomKz7VR0whi4l2X2shCjb5Tpp9XfwjOUioJtWnnwM7HpSbvI3xVXx-54H-FETfEJZ-nqWf2ks8JEqxSRe26PpN0JpCJ_CE0yURtqUchmgNZbc8vxUK5dLNvY2JtYZ28Su0YU91WSJy-R-Hp-C3DtLl7y07xpWIOinQzpEEGoQ4Tu-wbkmExBM1XRBHke5WGIgjgrYdZarVknKWC7ju_WAbkpPtjhk-T63QQQ7RZoQ_uT_vDwkUsEynn8gyQ9gZArZqdc7ra7A3-8_xbmCWZUT8rav0VI7c1xMIOW4y1c9HPgePS-KJsboh9DWjiXDdgnejHF6PEO0w",
  "ciphertext": "-lNScX0BKG3N0fKuHhX3nLYB84BPf3GZP7OLOGhGetV7_cYeq7l7WAy6r2F-i-NdCixHR1EHRSYJCxWtukgnek3UfyBAHht9zv_n8lEtBCpf-Tknwg0NwtZe_kotXisjr2UeIg83g9TuFV6c6o8YAB4gGEjl6ud7bobuRnDUe2nfDWnhWNR4YKzzpSMF8IVencPedNhtmCAbNcTMaahuhxu3rfbFfvxEJ_5slH--4bP2GrUGluYoBy4tnB6nsH4KnJCVaThbI_Fe4gcuTnbNvy7xLTrN-OCp6mGz9RLFOVXJxPLC8paeLEBiKA6Bc4X6jZgVYChdpZ3eoF31EiZWmFztqdFMD8CJR-vu4bExri1-lis6g-41-oob9hnC7d3ooA"
}
Figure 8: HPKE-9 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTkiLCJraWQiOiJlYjdXSEI5YS1LakFpZGRDdGZMWngwX1kwTG1TaGRSX29neTJGUGxzZDlFIn0.URDg9z5JLoq1TjDzVjH0UnY3OyCnOXeSUyVowANCjvtPijI4584Zeisnz-vWChfFJiwBCrFdERq0iOuuKcmL8CWKKm10e3a3HIWCWJT6oSHDavH_5oYUBEdWWAyqgNsvJdUgnwLmlM_ctigETg5sfqLgAYsjOc1tOFZAlyW-6HQVbknXT1mDJ_imCZHIembq3RlQDv_x9MhY-D8ULN5HoOW6GmsJYPIGar2UfAiDEHwvggZSIsZNddmfnSP5aE3ID67t8Go19ij4J2l2YlJE0Wo81hlfHJmhtopEN7STWrPk5yrql8Km0xSUvAfV92qSmGGkl7QHgOu4-WtyuG7GWj4tu_fus6YBEFQJDc6k_ay9sciFsuIhXZaw7Rc2FyxLMwQa5vsSFswfsJ0XM8bJvmqJfRJ9Qny4YSqemG_V-A5a5Mz8qtVTLdowayztUaviGfPYd4204_CCrX1ayyoeqPATOkxd3wg8o08xTOC-KN6hezXYHyRS2DI1KtW7OY13V5_wW5cUw8kK2UcfnOkzbdEr0gwsR-v_pT1qxzf52FAhz1TwUcphjcXlSvnus_U8_JCeds9Sw736EPOnWHWb8zuEF-Wvp8-Pwy8zt2xiuAWR1cQ4txpCEoccdZUbcJW9ngdiqBZgGfUN0BUP9Z5JUOId08prcH92wQDYgMdMSyb0cUVpkCv2xu0AiWAN2-Lc4NAAqvu3m6abIL-WDYjFvR9XndwyriiIZD2_OrwmenLrDAzQSFEBaDxJw8Qd3R1pkVfaTfpFgzibykGJTH5QvTRJYIix80imqXS6LzRoB8DmztDBZxa_1LvJOyCutebjgkJ4AT2rUMYTSbbxEwcT80Pou3AXsO5bEJCEyHzEdSyWzUmszpDCbrWpfw63DyDb6VxYeoPHMesah_KHzEbwRgDqXfMYo2LrkXhC7eFzQle30md1c43c5G52JY-wjnCs8kbGGY5Bv0m_IjoA9kikM1uR9rg1VXwxep0KJdG0W_7zs6gpATlDHtrKjuZM7Ln2xMgz1tyLKx0juSG2bZJ2ccp46mIBPRuvFNcYMgasg78ZbD_LkBAhwNXRjQZo6qd53pAMaLDLsAMRIpP-vp4O4qYi6CSx2lECsdoOaXG6bPvA3Zjewty9zK12wMQP_13Jsx0Zk8t86Bh89aZYYqC2SAdgdAnONig0Wz45BSKsBMH6qTHG5YYbYhpDCJNEHWY5JyyV8Fo2uxVJ1TcWlO_75-Jdqn9vDzr8QMl0k7GMrwZ9toxc7x0qaf2dmIjHEkXebZCkevYVwFIN7u_OFY3W0R8GAsgjyC5kEqq0ZGJJfKduvRXA_W5n7He_fkAr9OFDaz1_Z3T0CIB2mmuGbxDys7lMFYLENLnSU_qkZo0D9IXiP8ew-wumI-ntarPMhsUV2lhFjq14KfpDIVxKorZ-074jF_-zWvJ3J8uD0uqcvEEElP5LU4HaE_2R86dbuwMnwR7aAkP90N32CELa20kWMJCHCJ8bAi2NvRJxOZUT1mBbpaYPGhNIJcmx2qRmuH8SXA..RECEPR7XvvH4ydM0PytheegqcC_L9AwUkPoXg1eCW1OhvfMN9ijFYMjQXYq2lQK8tNHqPL218hYlcf2O8xpnmQmJhX9Q-6WF6lfsaGEjZyLcBX32NkOZIrIqO1o4Ft-ZjaSV1lOAV-F_jZx3xwb-oaC558EFKeXsQVbPEpea_OLlYs4-1xkT4mMX_PVMW2VqKbhm8EIYbe0zSucm7Ws1E1KFcX2TBMDyZnmU4cXtEvHjAMIl5heWJa5XRMaodnoNXUG3SJy81OV3hUXiIBlRfaAtCjUg7iCotWbzMfZkH3f0X8ggtTeJMbaNvyRO9HklcBcLWR3ggJtw6_QWRdgHJ3b0yQCr27mtlJKJTubWXrNLT31M3eRKg9SEJyCLfZUd4w.
Figure 9: HPKE-9 JWE Compact Serialization

A.4. 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 10: HPKE-10 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTEwIiwia2lkIjoiYTZTM0NGZmx5Ui0tM1RfQ09PaWlXbC1Rb2dHdmpKZEJIbFlqVXZTZ1lfVSJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "mm2p1uMa37Xptlu_5daoCDmWlJx4eya_XEN5zNgphpc4O4DQE7ia4ydueo5JpEmAcznavahjf86Fx1068PLBaEgemccjspWZPezD0G3qcEx-KUTPmxfkITLUzmsSIgqcLRgGuwhcvcnf9fyPd82TkOSAh9oWzxXOH4UQUIwv0NNl0mykIjzlKTwmxEB1EhSTAmBEmqV3FQ0MCoWf15L0J4G4VOBZU11p1TD8tLZ0uSIW1BIbfIPLW8a_OkTxx2wiCjGKZM7bkKX5qLSf7m4TuRd5arIDThfTARsRlZvM1rMQzgKTEuG_bnw9C-APxKrokQYD4ogIooGECOVe10g9For1aVvX-nqSDG1iiUeuHwYzOXA83bP11_PCqVJ6l33vA4TIhZg1Isi0I3J-6s3YVWXzMGJTel_DEnhSjBVryVvLdN5fh8FMf1ghaxNzrLJqqdMURGHZELck4aPvqzcuKaSd_fkte5PxZLdxoDDPHLVAVjV4ypQjOwi76ejIEyX-yP7JIIQPV4sdtfHpg-HOVhD2EMIhTAKUtfP7gk5NQ2HdPni41c_R1vbdR8E-GCnjlu9bClGp9Vz56oDCFPi94UCRL1ziPvxj0aSfA4Ui1MT-3FaSOtUeIZ5AlHHHrfy_xe_av5hXQIYMeHSu-JSRcIJUzpHqEbrOXdIEk4sHnJwBye4tYtbje52gDFrJuJFHq_FW6c40L5bqOHqAx99T2nyi1YomTmk5nfhKbclBe8RfD-WJjQVmdbUUeWnRybitdOyhC_Qc_tBjgLa87mKr_TQphF3oz2fI6r2MLoiAQWVCXkPcJ0znIDFYq6rB3JUuZs8_IT7SrrD-BeQ-ChxVBeRcTHYNPE4CZTuDnBXqcCt7-ZA1S_5VVQA5N_pK6e5q3iP7qWcN16kmcETTyBEbbhOyxgItgI7ziknhNOScmm17PT7JL_AeR0FadSz_MPq7HlGHyC9siksQIMMDF9-iEVnuAhkZP4mlIgvEvixwL1kanfXap2Ienkf9HKQSse2_T70_UX-0o1vFx9xhgFnr5ailltPNZF3XeCDoxx5I-nubUeoEhE0Nxgo2lXhCJ5QPOyQojtkcjgHCyu-kI22cPNPyKBLjERzPZnT8GO0faatKYRdDIktjW8u5fkGcTEvDiy3NPwtdncuxPeSV6zNz8J2knOTJt0ZSomoRx93G5x6zxqrc5XAn75CKzYgUvZ_psGr0CDJkQN1hi272br7mdtAMgGrVYGwJNrRwLKii4zROa8Ih8vCwE2lFHqyevMpHFpkggWNLHbCmUYTd4w-hzgGK-l-d3Mm_O2UpHab3R7gERrDGOo-p3-qU1cCaQPOdC6upw6GprSUF-ACRjS-BNOMXN5xWRCZdeCJHmCw1qBj9iT9ltCaYl_GJUDLlZg2iC2eIs8VKaGubqZ7nHv8lIlIL0DOg6L6dSFKZE8MwAUsIDBJeTv6pYkjIIKhZHawJqfbjUfssk7A824u8ozu1bA",
  "ciphertext": "VmSWTnYtqm4p3I0li2hc38o-aOJP26KD1tXFkrIG9OxmozaGfcVAsNNh_3ik0w2I_8iAfcIXv-f_aATxn5npzT9QmMBZQNVo2buth6numEf6Kx5qbdh724hklM2FOBcwqbBTqnt9CF0025e76m84o9tMaZECrrY-kka3zunqNIVA1YS2NjhRXmReuZh2sw7fzKs5vezvbGgdU1xdZsdWRaGrjxade6T1fzzByx3IrdPKqLVSf4v2x0qJqE91DwUOGhR1soItypfmQQtOs__uiIyBuLV74UmIVXGpBlBzmomUFDLOZk-Wb5qVi32DeDklcwqWfDJMV-L-7nBxKq66gXEl0TpjrWmWdA0SYJk-kuqpaFpE-hQqsEnAncx_iaFKBA"
}
Figure 11: HPKE-10 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTEwIiwia2lkIjoiYTZTM0NGZmx5Ui0tM1RfQ09PaWlXbC1Rb2dHdmpKZEJIbFlqVXZTZ1lfVSJ9.7CbM2zkGtLCPhBhO3vo21EOcaaFb-_fOXHe2U5JyQYzJ6ErkSiQNh4962UKBFKhD5PpyWI4aqgauXzld2lJwpTrjKD6OhLR_UclocA1MrWiNLOSfgwTCWgWLxOZLZqc6nNV_qDh5q3jmnDGpMsX6NwGAs-4fztRZyym0f5q6ef55ruhSxCD1kjshHQnT9kbeP1227mtr7IEscF54nQpZrUckih0BbjwZjXzINczJ1wCZFuBbEs67ueXDNLBq56NM_SjypZ0v5gWpcQYSRrp-_CaYJysp5et0g5dBPKuiNdQ_3Y1p2QGNwDkhbdOa52izXGYBDbQuIosrddxpoiNaWlxgqzQXufKpYrzzhpPr1cKqxXTMHgaarjMDqg91e7ecjf2EqVWbjpztfoIHgT5po0-3zlUmLaenPdCB0mRKIL9Kvz6cxM4nhzgLTcDbSCwjaiMU9Z1IAS_G9fg3EUVjuBvW0ojNcpNQLIL2VIW0aUlyJK7pG935oktfqzT18jt0aoVDC_EHsjZ4o0XJhJOny_bhkdvkM5EuwJxGkhPyAdHVT9az-ogSY0ZB3TLwxORSr235t9wtQYjnDiwQdHAp4l5w0rcayAPfsvq_qu_4xzaaDoHmMJ8TJHlu2aU6twrnCytOZxLEsVeBjF1mDcE9BB0P47yUfscTc0RBpOzHdt3xG3APgN_13FPIzvPOsgRxgqXGAaxwUq5hzdWgBqY6OBiu_MbpVlp5kdfrz6ti6DL4HqaqdEKGJUGETQLpXKsymqzKryAe-ov2AItxXJTBTP-NUa1Qgfy_kRLpvAS_xYcc6Jx3El1BBdDY6GCAXvD6V5M8tfDRW9HhfVAnDQodkLRv6yTu0C6CKlOuK_Z3bwO7brwNFmenb9_gHcC2HhOaODAnDoVpYqAtatZVHM1XpXf3mDTnXvkN5S0GJIDD3FcHz58VUhWlsCENaTG2izbRMrwJdss-lfDFdHMVqFJKSJF3taM5SjFSBt8cJFmBgF1SjevU2an35GriiV9pwzLNg4v45IKGLb90dT9zo31_9W6uIvmveZCKFO2VUcVx8ePi0RqlLN-Wzhb9B4wJJQRllinqFIcLd71yL8a2otP8NdknjJD95z-ur3ys6ZhazGE9z92rwIMR9Vm6rDg2h7qKfLn7CkxQ6uGQwq60wwu36q4Wa4KG_I_lJHBnzbRykDBKcY4DtmlMURF16aRSNcNgDQX22k1w61e3hQXlbmpUW_6LSqjgVDtT-qFd3EhZYs04z0OAA_e8ImOjL9WU4Z133hAp_vVzsPHXQDsqcS-xS7P8MNJoMnVe4JprGVWZUC7Yv6wwzI_a0o5u9elvcW3zuf-eNNBY9Ffso7x9DHbBKCl7tmxZRbQOWKTKfrNgRfdw4tYxewrRIQnqP5DzM9oAwUPUEH44ExM_elyDMSwez17BfL-acyWaULVpuQwsoox4tEG8S_CVRIM4HC3d3n4M7mqRZvFx1ORBc6X6fpG8ZQ..0mzZ_XVvwOR1tNgdG69EsTyEdveUEdULhF9cE0VkQdlDbBPxcJ-JkFfnwqG1UGHJtj_-spElQheARfg7wb1JG32iW7WboLN_misoHA7EZ7VkPJY5YwSnkboibTd8Lw-1fA6zobsPy4dtFV0Fe5SFvcOANGj3Y3ZGCTBP-Iz6bPuGdU7__4KeQmi3-bhAZqpDva1KBK3LSbRuo-bdNp30_cnB1DrbFl3cWYVXXU1yYjFVKm5ANtaM_-9USPdNDQOzJcBaR6-9MoHuWGRe3n79GSP6wwQgy8AmUlzFVVx_SRMS4RutEGvwtAGZe7Hasd6RYn4mUYOMeJ3qez8bgnSdsncwpSEAgA2GQvrrfEIkN-yf1cwKxz8Pd-OpjFZ389vYwA.
Figure 12: HPKE-10 JWE Compact Serialization

A.5. 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 13: HPKE-10-KE Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTEwLUtFIiwia2lkIjoiWG02bEphX2xVQTBzekVlLTgzMGdQX2VYT1ZNZWJYbHlwQUtxdU96WWFJNCIsImVuYyI6IkEyNTZHQ00iLCJlayI6InB1OWNSY00wS3BFZ3g0T1lIQVIyVWpJNHQxcTRPRkluVEpXdlJPMU5zRUtQckVQV3daaThjejlabTZaMWxQVWdvWTFxZHdJbDZiXzRrcEFpbGRyQ2gzZ1IwNVhIdnI5Y2JRMTFGeEY5MWJjcUd2eTdBc1lqV1QtSy1ObDFwb1drazB1bVVrS1N1N1FTQV9kMHdlcUFrekVIc0NpSE1Oam8xYTBWYjJLS3Q4YkgzckVYbE1uRmI0OF9ZM2ZSYk5hclEwTFlmVHZIczRVYnFQX1hMUnhFRFkzMjEteWdkOVdTMkdKZU5WaHZIT09GTVdmNjlzRE1HTm42WUlsYmZ3dlp4MUU2TGxacFFqNXFYdlVvYV9zLTVsa3Y1bTlUQzlxSl9JRWRzUXJzd1BuTFpjbEpLekJ2ZWtKYW9BRDQzOTlNcDJFOFFoWnQzRUJudGd1ZHMzTm1NZlBDTnRQQkItTl9FaWJwR19GOGZRbDdkVGtVcXB4alhqWjF2WThxekRYdXhfMUplT3BvZnVTcmdBX0xBZlZuSE42bWF5bDBxeDhLcG5YRmZERjlpSF9Gdk9iLXZkZFExS01rc0tzTmpBQ1dndjJ5cVJON2MxZHc2NFBOVlBhM0NuUVY5X003RUZWYUMxbnR4NWhQTzQxZ3JxYzdnZnhiLXV3YWNWZEMxSV9sWlVLTlBDT0h3WFNJTWtQYmw4YW9xWWR1Ym05S0xyN2lySEN5RHFLYTQyWXNpczBVeDJBcE9YUlRTMlJZZEVoVnJkZWxRQWJVMEl5QXcya09QZzQ4UDQ2ZS1uUHIyUGpZRjdRM3VfSEdhUXk4LXEzandVR1VqYW1PdDJMd1Ftbk9JYnRBblJERUJKUnpzbFVESk1UeXU1Y2ROV2pHV29qZU9KVlpTbWhJdVJ6Y0hnT3JBUmg3WnE0b2xkSnplRnJzMlVyRDd6TXE1VlVxTGFfSnF1bERvSHRKakZldkluVHNEZWswUXptS29aR3JDZTc4d0JNeERYS2ZtdU1DcVZuWkVIYUt2LXNzY2UtTm5Rc2ZpYTVXUDNFR2dHajMtd2txMFBaai1rOGx6ZkYzelFaSTZkcjBGbWh6VVdQbjA4OFJkcm9IazhEZlp5RF83YW1Za1FBeHlzQU5ZdXZVTnFwc3FHNjNtOHVhZFgzV0ZLOHM0NlJPdHR4VEFncjZuUW9qU2UwN3pBNmtEZEVPU1U1eHBCcDhjcEFnSFJmaW9HcVJjTElJRGtiLWVad04zT1MwUU9JNjRvZmJaaU83aTFXWjJacHUzVGd4UlhMdG9BeE1Oa3hPOENNUl9NS3lkVlFWNzlKTXVwc2EyLXpsT29FQ3pYUWZtN0Jva0M4MHc1RDQwd2oxdW0wa0hmQUZUNkIwcWVUM1dMZnNsRlVlRmJPMkpZUHM4aUJXaDBucmF2QWpBZkZycHoxdGxaUE1UTnVUT0o5LUVTdGhobVJzRHNPRnY1Mkh2OWtPQzNLZ1psRHhqSFNmXzNIMWU2eTVTUTZVc25oUjktcjVISHNoV19ZTEEyMG9FODQtOVkwSlc0V0J1Vl9kaXJDZ2dwZ0pwS29KTTF2elBqNGNCcEpuN0hMRFIyUWZWeXJiMDU4cmxNeGJKcjdfV3NWNk1ranA5YkFOMzFORGlVaGZXYjhXeG1Qb3l6Y2xXY3FnRElHRjVSeGo5VkRhNHYwX0xEcjZQMHhwQlhDRS1iYzh1UmVjZHYtSXlkUWlGY0tzV2lHRUN2d3JyV1gwMDN2Qzk1M1J2UmE1TG9BM1h3dlNLV3Y1Z0FiY21CeXVtZ3BseUJGSjFtZnhCS0gzdUtNcTU3UmxUSHRyNjUtR0hUZVNEaTdtWURFTmN3d3FzZkRkd2VhN01CWDA3Z0tXdVNocm9FTmhrVnBIUGRmSXgzaFZxaF90dUZBNkpiS2VIMUFuanNoU2gtekhqRElRR1BIUmpJMDk4cFpNVkpXYkwyNko5RVp2cXExR083VWRRQSJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "9q29LQMjoRnL35n3",
  "ciphertext": "B9cQlPaZlg4u7vfI-h5J1baMdHbHBXOYAuP_C9ABbkF3P09Jy9Q6AnFDwJ8nR3CnPxu1ToMT_H0dI3bGzeQg9A_Qts761OIqLzW_H307jsNUAQyDzxBxeAhNjYuGEFLR3e_161eh-G4g5GgFf--fWKf5M851gYTpPaM-Mq89ba2LFW9ZwmeeCldMdRjdU_-bHy7CSpoqLXtdZEBS0mzcnxwqRm2Im73rTlTcuXfrZhOp0FiryTZMmTQCEIfZ078S2BlhVgGBpnJSg1j33y6mbYlBEYFpaItm6kw8z1ZVGvVrpdeLwKsUXBsmDc59cDYZPi5-jtFJcgQpNI3Msj_7eqt252wCSzpnVJdtG9rpw288",
  "tag": "s5_lPcW7vpv9M-i_OxVEkQ",
  "encrypted_key": "0Qu9ToCwgzv6ACNjJGtR0K2QNb74_XLJCbvtvVSe0FhXkUweCTS5IQqZrRJg48eg"
}
Figure 14: HPKE-10-KE Flattened JWE JSON Serialization 
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.Vd2KRzZ73HRzwefFnDrsDHx6YKutL-dDd0IWQMOGqdd7wQZOyvGi_4qdXJM03zLj.kFlIfg0cmBvv_k0p.bn44Q5eXVl3wZ4_0P05p9G0zjZMbtrmgCL1gVuHRNQaPKZA7uiWzq31dUhJL4G0hja9cismjPeG4LA6njVPTthnX05g3R2H9uwEdkYA2utBJlxzVa2HXP7ubsKJwAFFPe67iAE4_f8aLDe_rCPv2keJ3oLrkbKBTwvCXKmpKsLmXbBtbfwnpqHtB8Cj95cerOh5x6Si2ta6_Q4FWKySCy2cB0oR9pphpn2My0ieQW6zbetDdWusmYf22hMhRV7jh4tHc6OfMpU-mKoWmoV0S8bGdHKsCxcDGk-dr-COcmt2-DWrbXB87TguSkoPu5sT9uSb5kvnUw1l_hPaA5n0p-hNKG5n8VsD8rOEqLlbZRgDb.k0FkmgllH7wm49VODHTlnQ
Figure 15: HPKE-10-KE JWE Compact Serialization

A.6. 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 16: HPKE-11 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTExIiwia2lkIjoib0FUQTk2ZHQ0eU1XMzFidXI4VWNSenhWQk5WMFkweDMwLU5aOHg2ZFczQSJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "gt-5reO224SpxF1elFdvhO8RXFvs3gqx4RxukZEiwTjxG7WWhXkyhexZrhsfhRL2nKpD4n-F1FtSWKROPX3E5DpPc_xzqcZ_DT2pessIInJjrQ0z6K5imzl_TC546TltkJdWWpuvuPVdi57dJqYokPhdG6ReLUNaurixmLNpKVHT2NGg_vCb9GSWSl2zmLtDRHFB45Dp24JTfOS6uJSGlqjl1dmxrmWTb1XUfjLeYfNGBBxarNtxVYesEj1EqQA2eQnRGpTrClHSN1j0OdGJnfp1YtDiIbc-PezWx7Er6sKNSnBpzdUagxj5iO11u_Z9zs2O62rYMjmoieNGq3oY76zgW-EwndWyZZQ5SckfSRV22dj4MrPUePX4Oq2Gm1utHpynD31NhrsHVV6hDVhG6qIHyhU53mobroQo5infC8yBaEl-t9hMpxV5RBtw_7ziOzbkC8bH_nY6XhOnBHGDXPZW6PLFymSQX3Uy-R7tMBIXFRi34lxOjonpuHKRJxJegHgGWSYKc36-CFP8BGUwYqdCZbymMx4qQDtYkH63RmP5l8oMT8WP5ZFPBNpb8OfN8yLknJUJF05RUaJ7Z49LR8d6AFttuJbvhVdMZyLUSjYG3vvFNXtkB8T3IrJHgBkD6fa8nSZbd4nefd8YRLekE9ifF3cNB278Mq7n64VksdESke_c3bS7QSqNyw__jCFyOTxNd5Wk1BAqhYLJDSMqGofGz9CYPyx8NFcv6Vakg6OxswknLmIu7f7IIejFGoJUIY7Y2tiaDgm8H_UJH5jS71VrjpbK3e_HSkW0-N7CG0QlSLC1WD5R9qfNL_hn9Ufg4pAqCz7Oby1HGue1TRh_uG6k9VqN6Kbt1BWqPA6DkPB_qE9U4sldYTgtVKA6QN5xxunwGAqpBGW3UAYme3YPl4ep0caiTbZwqP9fXXAtQrGwYoUhyozFIxx2F8nrjx6X89JPKJofqy8Ombvw75EU74vJF26UlHl2Sy9918USjiflfmY7OTp-pjDyi8Tt2uasd5MAWXohF2mmyOhS5a-zDRWPuVnDO7vwkkugzC0ZDaeXAnBwRkTWLCr2fqyYCnzQLq426XGGs8QAMBC4cjIs-UTnKWSUnFMxEKUBwtADeFaKc-gBn4adAPk8N1kB1cdlaqr8IcjDS-QVpkHW9-OFZ-PYj6d9pZi70bVZqSvOaZIHxNzxy0FG_Y4a-brSBgKcxKsF9MVceUmyR-n7JBNHfttF7oPmfgIs-YdtxHkMn806nSSbFhmEhf1_Mw4OMUdH5JqmJVDDUulVOUSuTLMuemz3j2gvPOkeETO_jVE8x1bXdz2R2AtN9JA8T43HKhfr6mvwKFjHbB2yVZiX-sBc_8bbGlgu_px9aRenFgKrr0TAmqHxmY26HzPD2p_EYLetFzKyUVag4HVu3r-pYf33wF4bF_CM9DE2RO76ElIHRAvujzeRNaZzqN5LMY7gPI3Arn4IO1gcANZaCv04iDMYAw",
  "ciphertext": "S2-ZFCP36p63qxSXNoOwCq_U8IghPPNIqubRWPP22K6uZN-SzmMqtuwBHC2moQVr5GiwcuI8T11BWVBU7XtvGybmMP1IGLQvDgu6wvFHbyB_BD51PeAHG2HCu9AZDuaNzMsb5YCUYSqXqPuF0v9mvKPaOdOCD1T65fsOOJUJc9pnnkrYC9fJAp8GkqnBT-4TOFay0XeiLV_70Ww3PmTIa4oP5Bd10vHreKtFeP0elNNM5pWkSkGsvCAqJnGUHXMNBQbjWC94JlcyCwv_D6jeBwi4l3GSL9K7ygx3gNrJb37pw0TPX-WJ-43QXOId-vlLHjGf4Kq5XF8cgA863gClvRc7iq2amh3l5nykzyreb3ucxcIP8gYML6xEWk9RdHFuFA"
}
Figure 17: HPKE-11 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTExIiwia2lkIjoib0FUQTk2ZHQ0eU1XMzFidXI4VWNSenhWQk5WMFkweDMwLU5aOHg2ZFczQSJ9.NgBYG0oHE-QWiYIRGfvNVKa42dIna7QgCTqyGFrYuiLiVjIXjfQ8b8eC5Lj9_SDOcT0NP5L0epHk9qjkPDXTpjVReDpA9VlAGcJvUbmsSN0EJr2ZdqUESs5NAIQ53b0AKgzUv9_2mPot93R-Yma3GMzsjv2J8BJBEuT2c3mIfcjdQenkQmRP5usj-rmap8XugH3jy7EtA5WOrfCntG-IsQ_dfPcK8QBVw8s6_kAdKsbWxOpUTm8YoKK0SlxA2gvSrpVx2VXU8msf02bHVBy60gDSYwqYavNc-dIKBteVFnqSWbPKGzPt2-AZeBqoLiDTn2n49tsfOadUuqaFsse24gV9m-NtPhQxFvn4SRyYtC6_r9okv5e1GsyD70SNQanyqflf5dtdarA1PfMAPiX4XygRVjDMvhmPFiuWuaLrLyfFHbqD7hkN48j6H0O-kOd2nDxBuECB8UbDShcMFBJtJRtNX1s41b2by_2dWLupz2pXKdUUvDwHoqseVUPYfMtqCiVVVv2ndWnwFyYuBEwvYE3JQTiA0QW3xTSCJ8s0iGOHR8NJsnxhNHIG3d9XQk73Hs2y6jV7KE_ArLUtBHMAFgiP3Rl9yErGNQe36A_CuwX9yR-UgwMD-G9esdGi1DRhepSnQ4alA6lX0kAzQ8dFiqAwsL5O1zEHgxWZKLFkywHJ4sf_2AdarAdEw49XMqjpIeUn4ZeXJ5AU1jjRjbLWOzmb-6hflusBhd7WBYHONhWksxWFPfP8uKjYkxS4n7hwQk9RbNSCslgDRfk1CrokwqkFA_vPS8FQPBWlYII2WFa8xvQYhUc5PCY_YuDoS3JG4mK0apmym7NLxtNnQn0UY1197cUerG3GHG6Y8KWSPh3EE-PAd7-gcPIVDSq40fnQyexYH5hknfjxoodcuVA08TnPmQOXl0CBfep0XgR2qQyUzjJkmWeDNha17DOA0Q2p8LqCtPuV8MzB10ZkgSVz6TzCjNhJ2ahSSSmRr2_QsL3sw9STGclB9ffCMbB8spCoCzlGdeljRrCl4obKt1Im6812N6MDY8DnxXqD8q-dKpLhNa1RgDlf4aq_3iJgp9xEicN1cOVUos_jwkhB1gbeKT8DcmuMPhhIv4E83TcNEHbOiGKGJUA6KfJkwHD_90XV44urfLZrA8rzfSY_pl1z2gY-qGvMLP7iQsd_CEBIrRKcDUTr7y7RcJ_8Ckemp5EPuQ2eVgrafSO82VuRJuZzfkxCMdeJAydn0kr42VGGLZoyHpBZqqvCP6ACg-DN0FfFTxk6zlqA_pGpgrBYL8ek7FRnkGNmZwzxHW7l3tx2fnHMkTlg2Yt3LDW0iOjJOuN7FYV-LxHVahAwm9971VgRZsmznfefueZ2aTzPso0TmQ9ts0c2DjTyfcyP90fDJTyMt2EV3Uw5r3zFSa2a1uB70GmZnabV4fVpbIHLFA03wA_TPYFPnjw5BQNt2RfzyKjDsdQi5D05QiCV3j0PlnBtAw..vYjx6JxOBwOJJQhG9OByrziw7h3q6kAmdr45Nk88I3kn3f8olj2UpQDINmz9EkhoPiUIVq1Rd3-kK9wLjtMl6US8oRXtBVl34CDdjVzqebYjpBBqNwDvYUYJkOhN_VMiAXvRtuRboHIJvqsu6CnkZnJnWZcxmjTdQDbe8o1TbULRPG74yk9iltytCWgnlGLtTKoBn-FSP7jGL_feUncC0Cg_s9RafGeYnUOezs5u5ZEvy_tpdB4u2LG_YpOkfZ_ZWf0EEdz3c9JqjETmiJzbfEzordJJNfrzHVmCU8CEyZUrUg7SZcz8qq1pfzNbP09zw-5pKvBFPJbzt6TPNc_OKdbFhYV2bsM58SdHeMksDz3LdxzNXpkKp-iW20xUur8nuA.
Figure 18: HPKE-11 JWE Compact Serialization

A.7. 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 19: HPKE-12 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTEyIiwia2lkIjoiOWh5dXB0MWw5bXA4UnhNajBnV0R4NHVaRmgtTHR6bmFyMWlQeUtTT2pBSSJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "baldPq4_60S68k_XAZzzUyumOvbDxtVhgRgWJjrqEj_8vhy0MthUWceZOVHO4LsXGaxWXUOqspfM4e3VwcgUHwQnlYDWv0cXzrcP7DhxKQdZbuPFVd_T5nXt6gf8LR8qm_7iek0tmzaO1eKmkqyse8kux0clxLQq0laVmGOtiSQRWFBnGZ2ug5HztjKrFacI3GHri-jUTplkjhbMFWyXucQgBPZEP6upNZ3MOhoBEJw4bkzaefR9s9TyLbbb1eg4IBdYbJQhkS3KOEnfEOVYUEzzC4WgLo55fOJGwVVNRnGmy4u5i12VH4GXY9OyY6Iv_OzQC3iSfcKnaX8JzrAlVwy-0Kk8ilxyK4COCAm0TP1TfqejPVmU5-nXd8eC8z86zZcaLwb-v_tOiQ3H0YysgDtfRZ2Ql_x1RiB4bjbR0JT0Prc-30uOClpmuRQCn11tnKI1yvA2gdo8-nx1XjZaDdO-j1iE5_lcfsy0Hq57ueAnh11h0bzOGasgBPK7pX40Qvzm7hMCq8nSOMfX0s3k5U3KEIwqwcSYm5sCFA6d7l2AiwKh9FdOuFS4MxsZxQjnwzMRumhOPrlq-kDPILf_kvsuy82Grq2K6pI6tCrUhPQCbmGF4gfDV8t8Eazep97PEHNdRtpBFKfjCFaeSjATf926fgFtByiqIxrEeTSLhA8PT7uf2uo_MmMyDkxml_3sKYruYzeaTHBOHgCIkg5NhmHeKcKWxBG8coFLrOkTSBdTFh9Q-edV1vuXAy2DKgqT7DozRaInnMxh1sX0EBIkJhdl6Nrx4W2bBbRXpKhaBl0xkwTN84_WFzphwdybJW8R77dBpXmmTU71D8s9u9yQQxSbU92V3ZPnYCpi_ZrkXX10kiCjScw3h8d1ORGyOZzDX-O9yoLGJA4nkZuy26GmeaF4Iyaiif8mMH8ERCT8BKmQlKGOkPgvyMaANAcpaF0TbpZjbjGMq72mvo5dS4zsjT8OrqPrjbph05Wdary7uKsoM04uHQxa8hi0xJxK7237nO-FF8gGY9Tqf_XVXiFEoc8kzIQAKmbbuxV189IJdsT1aityLtERN_aZKNcw9knAO_auM3o3GcJO7a9TSGorVNUjPCWqVUpfY87qg2v-ouLmm7OsVt37nwyQgWAyOlgDmeV86QDcBBqKjjDIt0IIjrxqnSQm7PR3owmZ8fjKSYI-YUE0u5Ax36F-3A42xfhxefz9EC-qo5AG1462OcG-aDKfSuiQykYiM93abYLeKJzXIytygP-GaNOoNuyMxppy9OMN6qLyQhgfN62w_vyi4kNTID2Nk2lzIKYhyUV3ZATqSyJpwcJqOP8SUyx6N5DRoLZSegI1PJQ_gj0y4W54B6rn982Ky0JCYOL4YSYNv89fZCXuuBZiydLdzjwVSKTVepRsF5-nhSX8rYBNX94m78r3RRO6oOhaDbAKdxwYI68C2s8KysYDL-LWWIdO9Ydz5S4MLIqFHivdl6aTLopbynpv61oC9tdrC9t1lr5A6pON--c_4b3oPi06Gpg7lRlFXSMaedogxSVB-L36Yxes_4vifEr4xiZwAH0de56BaNw2DlDwSdf8PeZegS1H-V9MK4QDPvSBi2C32nFm6v_HjZqY3ww3T0N8d-pu308Fd9TYzEt5UTzu0w3yLghL2b3pwa9-pEEAVnCzLB7RuejpA_B-crzFtwy-Ub232PRTkZa4Dfm-kRx7ShG9qKh7tifJBYByWVLHE0uQA1eoVBxHsg3VM7PRnCj9Xo21sIbZntD0vjQNW_C2AJvvnCISEwJWmg3zSpontHVSLusahgoT9s5hyci_Z0JDFoXyr5RaRgtujViGygHAHuVknOkSqVEt_FJGJCNDbCbSbvkT3HTsCITLWPxKLPD0TsJJjsVZxeFKm3CF8wi30B-3XfE2jaoHxfiJf5h3ztpZzAFV1_cVV9k_DJjZTaJnkPce_vRWn68IETWlk4GW5ZVh7Qg268XdldMx57WZ0GIgt33hzMTzkes3FDBe_DsN1ymRW_lkdmSjFQTAQv3O8ATbUVzYBLmRPosSjovaRmGrAoMD37SOv8zuLU9JF5LRca3jsGgLvsYEyANjnE_6AzZcFXSkRfTXTbfLOXEeV35IAxYCrhqB1VK2mzIauXDSIWQc2mq30dyqQN6R6uAf5K-Y9KWUEpU4RG8CmMk_86NBtFBtdeFF3LgkFm-i0tFJPXvzV2bC0DxR",
  "ciphertext": "XBzrIlcea899XhNHHB8D5OUR0iIK56mYWtLynwdFGbI2W__sdmj0wKcv2_YK4KifS2myoOs-kw6RUIFdfozU3eHuCGyys0z7aw8Rsi6yA2Yw8w2H3NbVLYSK1ap__o9CfG_z-7QsTCbfY2vk9NcidKVR6wCegucgaFYFSMI_Wze3FrazEVf5YIvXrimn4O3L4ZnkMkX6X1Y1FkoBezPgN5HVdhKcUIgp5TZMMyR3VAEIswUtb4jIYjImUoMa2K98ROaAWduDL7FXsX0Y3rjC3opnzuWMR9pAy8tIppfphJOc4R1y1WS5xm0KtmTysC-6LP_wofUhNUr_sXgve1Lya_-V4MLI53ia2OuihX5kz_TcvMcXF3QlKzWb1tHUBh0SYQ"
}
Figure 20: HPKE-12 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTEyIiwia2lkIjoiOWh5dXB0MWw5bXA4UnhNajBnV0R4NHVaRmgtTHR6bmFyMWlQeUtTT2pBSSJ9.sSyj1wM-UgieX5Hkl7Qqbp6dYYaWGmfn9mT3qnAKa6HRlwIShuNyX5eqZ61rL1U63gAFn6zXzmnppThCelrK6kuNiyNI5I2fNf8GbsC8jrz7eiIlsiqsJ5tLdGf8lYSt6g5RB0jCw6z8MO7cCIUERKAhGbZMluNvWCi0I62K4kaPyYDw63qT-YUDRj3uClY12GReS9V1NB2NQr_n8BECZE3fvNKjJN45P8n9oLAxiYgjUVWS-g3Kj-TDAbcUH61kIFlR8V8KhAkRwXAKNKqoywkQN_sSnUZ972a1FR6Eh3UtrCPbIXBrBPYIl7ikPNfe3txpF6BExic_z93c4PP1uIhMrdoHk1sZhbinFQlzwsCWOsC8NiySnkWBD-qPJUnr6MeciHQr-AzEtdhil71_wNmhV3GCMELId8X7aCiH-88P1qER38s4x_lDzXO78VH2tQ5A3IhNM84VyH7bg1MDVbd9SFcNeUcWxk4ns5QVvhJQEehBeWXX8J_UR97RXJMBNLoYXy4CTEHFnRKtUg862hV0yanlXG0ZCJpf2_gf02wRFYlt6uCYHJK5rtagMlxxz3CWhncJA6pOHKUBAtBjzJ7AeMuIM0wKJzwk4sWOcKzqq9URXN_mQFF1o4rtM2rRoUebO-nJw0X336r_wufsmj-786kr11rfTnpbJvG97Ny-v5VXbcDY954flU-pUUJqBDQBsOIh-Du4m5hGvTbJVg0cBWdFUzK2mbsJk29kb5byrEgpJ2ba_KtPDrj_v0AneCXpkyV-M36rGXg8eu-wZrbDYd5bYKwYLsSoHfdQuNMMwUqn07j1TyYrmpQmTkGa1q35IpBvvXQGpoGGneJGCHzSBEks-HQuUXuMsMbwauNA_qkQokdxNeKeZsFNPBbDxRIbecWVKHarpIK1tT8NTGq01hGxQ_-Vb7mLUivHU7BCWG_g-BJWeZRQMPQdOFVMTmskVU2Ah0Q4cp8JLSxi5BIGm8EkkbT1VnsxDx-vGDvNss8Fsl37LUqpAWyydak724_7s1-i9Pu5OJSHAhbOZDNjmnjxjbWX5NjzqJSEzLqOPR5ZGRmbS4O2-DK_b3jxZ3OmZv2JoWCfJpbmAFhJmLvtIVWB4paMrjZDaKyaK6oo5Igk-Qu3tXqUM94eiE9C5-2fLVgRZkZGH6Iea0nEw5x5h3AKEPcMa-HbhFTYtVumBpTawaHseUMAJ2uYxb7ssO1UIDvGJepaVE8Kd5bjM_SG7d18p5N-ZEvmyVGa-jG5EFXxkodXM2DKCYzByx4Z0kYrvbatmxaHkNcasSsU_5fzLV0Tkh5ZWR-ZxX3EzJGZ6tMpMJIZe1rra0MhAyoWCMMHh8dZy5YyX44b7TSn6fQlCHY6_Dy7FyLAW_ZtCABrU6-qxTi_Iusc9S2rPOVNdarbpCwVCEPPjdUUdEIXpq6xGcOhPnIguq-WyA5ZfS_L7wbIHsL4KKtdg_ea8ebpTm0L2F4_Ogvv8dO504cry6RKXbYyeRJQJO2Ap9ZFw1N5bBboCwYDxdJXjSf4l08EYeNfWDgkZcKEQ-qS4gxAoje8sfBkQUaWaYXBX2o_IaB3hFlWt4ZVLZZ8mPC7ES9pn7ElCwi2LffQ4DNQQSazwlySicc0p7G4rIyPvvEcL95PqNu523dxzkRVXsWUPpLtDj22rsAs_UIVy0Vv_8U1jbF_fnLFTGLcRd9XbP7a7lLjCyArfAu0VksOYD5tZXYg8SIXBwidrvEHWWwdVefSBfFLQRh4mJgdZs0qfb__FWNXIy5HaKUKefLuYAodvIpsui4Hnh_nwaiGkGw1MN9aMSI5ATgIgW2JJiu6VG6E4ayoMrHnmgLspXh09smfHHQHrbFq_nCnAPvOOsRJn99DEeRC3macWBmnqb_BCNETiEJuCDg2UtFnnDNOuuiapLlXwlVaR0tIA01KsCqZLxln20T_H3Z2NFxpiTw42X8-4bqFVcmyA_kR1Q4YHB5drLO8aJhUGKeK7p2BNwEcWEpWSXCgy97-JpwvtjT99i0xxGuiKXgx7j5Y3uMgJXteZ2r_5MmPQ4orO6vge7RTvVDmI8Tu14IDf2dgoMNLGcqZBRwEO3uU2gh8qDWY-zA_sSuMeq8XKzgnp-p4H_SmUQka_RWbJBHcAhSGSTqDjvLaGv-LOyq2yay5lzkj0Y_o1017iuAsW7WjyCiVqJ6eLp8U4nuqnSLOEqHi-ofE_voIVypz..3jzgZeBz9gZChfOCp-JAo85EBYElZabjFycGubh1gJOar0_1D-qFIOC0EWn8QtHz5TlO-SXwOHDv3KA0lzMuT14VAywHVCuWRf14EYkIe0rPX47UJw9Uy1hHg-kgpzl1UivHeLVbMnOseyerotBlHa5NWGtCapabYW-g6lGusyLB__qYywuZbQRdE_w_v9XvtCiDTtafEEtnTz-6EPCEyK0GPfFN2PkwK9Ky_rWd9BLIZKVTk6I_z_NQ_zTipA9mOlrg16RIPfQCimC9uYquuh2_DMqaFVWIElbH04K_13BmMONUWfVLIRpPArRxAMXUG7AaHWgohQPtsE8P3IwZ1k1vvgkW3WCMfMwZdPB0rq6V4XKtHw3UyH87kxPM-h__YQ.
Figure 21: HPKE-12 JWE Compact Serialization

A.8. 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 22: HPKE-12-KE Private JWK 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "oJjzwXKoq_F51EoN",
  "ciphertext": "aCnQ-6AlcUEL9M5k6z-VPMKYGf-3g-uxRAG-7ZWDTn6bnJidvELRavGFIMsWABPQmzHz2tR0fnNcpHG1IAUqSr4w7D0y4etP_MCClglgiUmctYJcC5Cic36o3jcUFLi3IJ84Mq6Bl86ZdNqYLCKVlJ2Uf7UEnv2kOWMredARL9ANEtoKz1NSaypNAKZyKs4lee4802MnhgXQWAUiNMq3wuemZT1O7eVjAzqdoYB7eq7i8fcEabrnzYVueXQ8U9dKC8cFVSWyl_TIoiuDlLPDmmkux1BNWR2tOrxDcRffaEJM7orxVGOym4nKfakztJMxUfwk0C9MRZoDI4Ulmale6sT6UpYBakBaHh5rMj7xRd3k",
  "tag": "Z16bdEOWi_4LG0HPYJ5HjA",
  "encrypted_key": "QvT6pS6neub0HAocoycrnbgqL4n67HD0JVg_XkziaTk1xWb29K602Iu3hJlIFWR1"
}
Figure 23: HPKE-12-KE Flattened JWE JSON Serialization 
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.CDytqRRGscnxae0n7tsfbiekU2XLj7HGXY9P1hNfi50yHKb8N3TtJxvImXWEoL85.AhcKSe4PHnSwXedB.jSS2JAjdixOBWiabwN2O8j0kWT-x_nPaEHV7LByYpgdT8u3fqV5D_qkl6Q5lbNj2AtLaVInjPHc7cPdh5O7P9R-SFgxKxERxlbbGaaNFZ-pa4NYWAqndzlH8rpLhpX59xgLd-pDNLXTuolTQAhs4ykQ_lLK56TdE6v88RFqkhqshWaPCS8KI7gfWPHkoabPnIn2FwEwwoBUFm3I4JfrCKg7nfUCPH0pQeeLMcWxFMcexWQ-KRJnYeD_LZEGQt-G4U09GS3r-lJCT6YeaG9xGJxNtK8RPDjzWVDNfMbr-URfA_WgsyQBvse3IRT_tPysu-r1tjFTaoSoi9OFNXoqXJsIsmiF9Qxy90B3hjbkPuz8s.FREHBTMx3a872ATUV0LWiA
Figure 24: HPKE-12-KE JWE Compact Serialization

A.9. HPKE-13 

{
  "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 25: HPKE-13 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTEzIiwia2lkIjoiNHhpZk9JYXdzSE8wLWM2bE1fZklnaDBobWNLVUdWMG9oajBhdzhCUXJBNCJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "Fp1ZKZSVEf-36FG5XturobpS2rNI2X30kwsOVpxxt8tL2XWYZVd9w1e1G3SlyWqt1q99Y_ZpxdloVcyWOGD-W_V6b4iDCFCVcEBxpj11HxX97uz7l9m1UwTnUDNLRWVjaxwjgBOVWM76AOwNqE3bjqpyrsIS2TIApg8yPHrxGPqhFiXEaoSUvf_UNOovmeQWmKtYQIhCWwZcxasHqL5wLDkU9LETUmjmOd-_cp4NCqbGGmt8OC5EATmd3zM0-UifFu4StfGrGPwWjWwnt7ke7-kNoULoD0XwKKAn0S_MbthVSP-i4sx9vqOT-HLPibZlifJKRb2jxqOK2TGaIRMe8cab6qItD8t2f_8p3Ya1XG9bWxJNvGEplK3uk9UVmJJkx-RegB8422-Jn_iZAddJdkB4QmfBTigN7Isj2hlBnkf81WD5I1Vk0sncBdMehxxrKX-JXsOVQhd3FsiaLvD0Pfxbao69BgncPYJfkS6a7gnk6aaX5CdukYIY95zzZ4kErtUaHfU_JocD4UefS-yVPwE6HJcRDq4Q7WeQAYOOwIW5O5f0wdpkl1noMgP2JR80MhuGzi35ATzivI5v7B4zC8y_iFbLz3IDUVGrpz9ePCxkPRhaTazKZEyclzt3KwxW2JkXLJooTmAUGP4vBA_EBRUFaPRi1Vhs4qM60IrUu_XyyYtwePbfFyivkbwoqY7BLZmjPU_sWchKz82KQnc3noBHYhXn3LZ7vf8xGTAyscQEk2H6EaCjBcr8OqquAiMLdeLRMd79MTWKDFQZ-hPvlqqiA8hnsa4HPjHGY1zB54t2no-t82buqLiqzcAufQ-WO5fIA1x57Mr4FUIUTuVOLhsH-3IsAIG5LXKkpHqEWocXKKMG1cQ_zKXPmTsfbIMsPxei45FEScR5dAnJfbWnZ0eQwjkuXcuwFFu6_RDX72YvKAloBq4qVfoU_bKR9tzFwYAvShqXkdNYR3UG3TLzpnX5MKMkJdSdaTKiPpFaN5Qd8DAYIWvRaNMce81NDB1uaxJmJV8kW-iGBTXe6Hg8ZTiZsC08KselTKrPxOu5Kunq0TVUUGiFTrA59ZBWAn_bVl29Tmm99oMJ_ogux79FJ1iH-vjMqfdPTufrh7u6jO8RF3SWStmgZQyNumpngIr2MnuDj-im2POOVaWhoM98ukUl1G9Nic9LEmFco7AmL0r8TFiJtaiwwp6LUwZ4GDTdDWKCciOeLZ0omlQ0ZoDht0D35zgLzvc143YkftBCWMYbiz29TTtLeLXjYHPFFAqMh4n-D42aYB8IE_B4yZ1STh4u9kG5l_HoHL_Rvi6VVLJySQYWooK_hU0dcj6311xhGMh8fLXMis7apIFoVFS5RyBIDTdUHo-zUId1GSIX-Vy7MFDaZMLL8HMdZwGSW7mnTLDeo6W3OtQpxum5vKBX8ZGTUIvp_XCcdusdbvS5rbQfoIomDR6hYWljJht9rHtg0PDVcvxo3Z-ibkqGdEb8zo7Cysgrq3HsPw8Q9wFHqw9B0j-igtsd2Gy5grgVn8Ui3OcEFtmMtBwKpo5EWoAhJ4KpnlGwhCoCU3DlBocmTP3lTfrmVUrQ11BwWvasvWJtlsllAZV_kmclyXJ2_yJNakOkNw12FYFjvhf8qp4OkfGeVHQ2Jjs7ebFXjTDDlGC43yNH5Z22URbWzUHPmRON00N06R3_ZdJt0ClwBl_I_061x-YFcOCvaY3hUrFWRdGY-RBg9yJ0rOe-gcYphdU8mzpVaijmZIV9rrTij4BJAgij7GqYjL1S-lTJm8SrJTGlNWdwvapBj-yTvLLTd_IZ89N3cWoMbnUnek1IHY3G9TCmca_GG7zQLHTXYzPylqPMk4MPuP7gE0lC9WQ2r-vdVhCdlibjvDNIfOmXuoS55OPuZRSb0gBnHP4rGt__kG51YMVoDLeOuAvbZ86iM3gYjATdKp8wXi0nuuFe0cCGm-8Mj2f0PxWTSz29M7dS3is-D99x8ntmMCaFhnbghxXSFSx1H4uiQCqbgUVvtSqx9XWqzwodmjOvO-V7gzAJd564TLyO5No0_B9unoOnC0x_i3FQSHkNaDQ5vOThKjW1ZxkEDSIGBRrRujfs8DGL_JOEo4mCYqnbCpW7NngWTmKUzXJ_bw-Gk_4ObY51mnSyzCyLs4uUWwo6Km1gscyJSlKGrpIN_TFstgL98C7BSMQM_IDVoN6kXxSsPwwLeLXLNSYq",
  "ciphertext": "vgyhIr0Mb8WtBTG_6QI2K-E9CF59Ss7F4DGwS30r2GM5atj4T2qsH0Nb-A3INeqsRcbS8JTghlYDUO-tlWW1CQE2v34Px1g9jNG_tQiQO97pwcpG-c2qgwy6inamfHcN2CGOC2VyAVISF9sjyrpXNqOXyrJ1dWwAsWJcUWX3T2p-IMO7_98BzXyen3zRLl87AYA-2-XMAVLX0v2JkO7A5zt2ienOPKFM0XDUl19cqbbODm3E62K0M_Z5K9Fpi_QCW5XOAF9UhMPflYgSLi2xl-x60Bv-iKbNpKnWbH-HdySyElhm9u218IPYBU9unLxdgsMr-DesS7ZdxtNLWIAAwL8Qug1vfQCp4i1HY9NMN_atWOFrrmNf5SGdCn3DoHnv3w"
}
Figure 26: HPKE-13 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTEzIiwia2lkIjoiNHhpZk9JYXdzSE8wLWM2bE1fZklnaDBobWNLVUdWMG9oajBhdzhCUXJBNCJ9.tqwq1yNyfGeCbtX-4xWJu8PwU0JowysSZ3N63iie6JAsC9UAlad-JZg-Sd0ksF890QKnm8AWKEEe7VR_nNwEQXJY8xas6UmsHVsXDFeFjwqhJtqOJo7JnzHXzsq5UAXR36NpnyD9AFGSV2YwgR4cNX3Dvh32_WJtbWr1GmvZ4NGCUcD4lib3qXhStX6s1Mg0Kh22bbICC0uOFJEtwt75LSDcUh53PhBYJ0867F9a8rLbguaLTUhl2YhLUS1VeGZFceLb7M3okIqF46M6PbAlejQik0t5mKk08h7vNgtTAR341v8L5TOYNJZAiMyfC1YkOkTdwiWXCBUbZeOX5AdKdarZ0uxnJVxS3UbT-vBLaeYDc2ChX33vVYTdvduLY_xWbkzCP0v1fMPZjkRw_wp-RdOmJp1s59tkwavAiIy2Dc_Mi9hrv8UIsAH3yOlHLOgMF2MvuTAVYu8aBlJQg_TeTR6e512LaP4vgIwq4rOGtlxPgp2u3Y6BHReaDbDpBCjOZVTGOzgr-bNI3TfUdeHf9Rc7Kb9iEjdUR22IYTli9_is2NMbK-pQPmbX5xx10TbOpxHTR_igwtFJRbX8yqEZsg8LYCMTIFPsxdlN6AbrRGEUgjXk_5xDDDrvwBznbXp4ZNHAnhVaV-RNh9ziyLcsSgNhMQCQAxOtlYfBWBnDh3UeD-cWW6-nL240srv9aoX-RTkzrC6kwWILcL-V1hvhNCWQXDLWpfkYSM-qOPiGPwqpFK9I7_K1slQLxZ6kir8H-C88mEafqVPl3nrtOiz9PgWHE0iygMzyfgJAlLFAZG3CJV01wVjfh5zHXLA1l-zgmv8-kMnwhwlujSGkhEvD8W4qrPipwMaMPEsSyftxbefn51OENF3bn7xGOm-m_SqsPKSoZ0FEW5s881sl7u-Atnzd_C7rImZ2MSwErCKikJg0wbCuYKUrLBeiPpeqJbyGobXY2YHSfqat4EIE84XqwQECMyS5CeH9qDLHk9j0kjJwpgP_KH6FJ4sEjEZmVwmmPwW7SsL0_lQsHepO22k9GSM-DUIceba2WitfgT9FJl6fbBeefQJO4YUXE_0iYDIcNg8kmMT5chsp-g89rfLZt2J1z6xAYcDE-PqJPf6aJPWZ5Y2nxFT_3sTXf9NpsLXjZ765suwcemqbRrqsyN4KTN82ZKX007izvPWUPQOPSiJbL-NOPLRPR9OCc2VzC3LHZ3bEKpM5qy3z635gODd-ECRbEKggtiFZrpr60kwMPFgwz-VMcACgSi-SY3wj8kg3H1o9JzQL7CedU27L1ZE_JWNpZHE0MlL5pD3N0nnu_ZyiMn8_LhQA_0llNdwYb4L0ElqzvjTrwbnVFgHlWfhSlCD3VAfZkhEXliqREhGNrFEouiknzRuejj-Sq5l1DzHNzazbpy2B8CRauFOAQhqJx9NCYuDGCVKiSsJmf1kSrHHvzh4PYAsKwUoHie1TzKfPl61p9WvoTezqZ56Uod1otA-9lyC3fsx8lJb90zhnvxk2_a2FB-sRWO4kS6e0tXGRQIXyylKsaU33HKH0tVltBHeFM3Uv70lFhKeteAq22bdkOL54QYYtEWDcSyl49SJMAkBry1GLgAsF1w8a6Y8SfIMHvMY7CQzfutKQ1FQn8_TOou_RDkE61lQrpVfUO1CpBPsQL5zMge2jrodd4cccDxE1kdNPM2LJt1d-awWcrA86VU96-1aU9RyXmwP4aE8qIMPUgQ1w8FXCCrqre5UbeFdHW1Xu85vfP8Fxxwr6e9XpEW-e14btFd8vx_D9AKWSTEZlGWekVfG7OPPulBuKkCFxCT_9nBgE69p-4GLLwopH-rNtrWBkVdFzOKP-IFvVNoTerau0hBvsmpTIl5Noumi_fLx2yNZkSSD2qK1vdirNytz_dj0fcXH0wtN4yF_tPVJC8EqXvBgG-Ju3_nly1LL8vk7hTc3edc1gvk1j5X16R6Td-_oAV35HKfarkQPJQuwrOdi6fA-FaaJ0EVxcjzoXclxpCiq2x-jAmx8aXen-q5heQ4gp8wau9unMNsYq5TK_22ze_oub2Yogbv-gfaEOReuRwhwozCcg8conYAAEXcpaOI-lXoSJ0vndl1u5uDBohqIhWu9vM8eBcBVZ0UsfrH6usLadye7ZNbyWLALtHq7qVHBEKXp_t3mPWswxlzSQUNUvA0DZxA19upylGbm3JyGP0JMC5dunPqYeTgvb..J7quUwPYjgCKXmye5jMpRE20msfusEO32JvTpTm78BS43GTYSa00sohjNeAM_Yy3fhRxE6cw87oSmUanXiWtnIZrFejK6v3A9ysvfaFG267FL6j1aZT-Fg-LgeW11eqPeorcioAjmU0SJg44K5nJMiM5ew9f9HMO3m9dhG8SDE5pzqlsC11qK3jrDN2UZMyRyp8GBCNz1PKduvtmc2QZHn43XsNb5dEGe4EpQ3royENR-eb60mrGRRyqoRmKzvKDEgwW82Lgb8Wr_TlnynldTy-LqJbgIEBwXKM62B-ZXJARngbrS9twDVrUWefhL8JxgM7e6N5UhF_ykpJPX7Tdl_nz8nTtHnIEhuA-Yugu-26EGibiFzW2EmhBzR37-olTQw.
Figure 27: HPKE-13 JWE Compact Serialization

A.10. 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 28: HPKE-14 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTE0Iiwia2lkIjoidFRkMnJ2aU5FV21sRFN2NTVpN2JwT0JrWWdpNW5ZdUdHNDRwdFJoVjUxQSJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "9QaBd3qOP93ul9ARu6AWxbAGzNCjH-VeVG-74GjEKWiCdCdhW1yW98qzace0PTKeHzIk18pfNMHSTfwjWnqxWHJuZ61HQwTRjMfM0oAjrEqoboa2B7CYCLbjcbigTfUOuKlvOoAw3xX20U6KA41_AP7qJSuuDys3MF99aVUCrpjaisjxlLIhCR-aJUjNLir1FMBIwhecY7C4qhymbqV3Nby7zEcn1Cgd6iC2lc8TAGq5ev6eHUrS96ywiQ7Zl5J7QWYLXgynm6amamUknqY30jG0jme_Ph3xfYT5q2t0ipT-fqHHIc_R4K_0uxcIfJkdN8HSTIadr3Z55cBKsiXoftZjCvTlzYSOfnIkXpJ-ZtpmcQKggBdwNFagUxC-IBgGfwlsSmvnDxTEuSeSUcSQM2jxG4fMQgnyaUJn7lPdl9rnpnpYwDYTB2usd81PL1ndqZuxOTcGVtBgrJo27F_1QA0kmD31qY_A5QD0u6Ulwm_nEIbilfuQG_AGPze613D0GNRu7O5rnCRM2nM4DGror4KpJXF5oVANwsuoHk4XR_If5urxkneSvOFAdQBmOk2Pux24HjOO6P8NfUMEM9AxCHakkDs60G9QAK56gGfu3wwIam_MfdAhMXftOiusFlDjlKGJQmYfKIJkNOtKNa8X3zmQjZX3T29ah60MRSR2Q1pm8StCTq0yUTteNIcI-GHnQuYoEE9g5vNFxFN2wRuBZl80nwBbUHWhbbjNeFBHOzwocgFXDKJ8FZXZGuBwL9IIFcBvKi_0bxqzhgXUYZKfmgmLi4Qqtqxpk7v-NYlNmYRHPXFduu5DGQeiMqkaWQSV7fm_ZVezRGKghWOVUoXti16bkoTfiP0BZ0So2RctkyeCw2Rp-jpr8eheW3_WmC-231NElrT1yxzCpN-WqlJAEnJouVOz1cV6w-Kh8jD2T0kpGYdowHw5Z2EjByKbfweSep5J9Td8wjSzJDblhv8Lagnjd1SapUc9QhVMUembNhrRwt2mfhcxsKkEc2h23u47I7Y_xUaHQBVrqBHzWPXx6ruNtUSgIVrCVOigUxQgMo1OFOY6eZgGvMNCt1IoHAI5HOqIjpR2_qZ53PUb_VEogoupGxgWQi4n4yrMcehKkJxeONt61DiaolSivCCcebtrO2ISCOL6Yj7Mynzw5lpkF6aIXTSi3Ai3o6ii2kV6nbg7XrX0j142RzDJLJxKSz1XZE-jOAMyMiwwraaE4dvFGvBnU5-7OFmIoZZKUnWIavM8lD6BpuDetWxzzbkIaARGZtSiSurl6PVGsfhRPFnkPQ-JgGEUwA-gUa0e37OuMbpKkl1hrKPUhcTedPbCV4E9_21kf3DzLCoH-q_gaEPKgvfzi5lSo1OuKJYkdmpzxZXMBJ6bikLxu_2pnQVkF_7HTrPdy1mcWYz6uWHEcJxG88S47VMsYJ7ber4X4DNlsQE",
  "ciphertext": "7pVnvMnV-KkWra2wfca70ATSakdGNFkxLNvdNHWtN_XQrifbMtSjXcTuME06O_DkXG7JAfNrZk21HXOAzICWQr7xtN1ZmGbucKKE7lAkHXC2D2fhbqoFAr3c0ck1N6jLUPx2HzbjvkikNS3UfggtM0o6NX9HldH1i4TNFnT4wbvEFIfpS5n7FIl8HwZKvJ1ik8XMkV80h8A1Ru0VqczuD_ZJ1axLD23Lto0PVcpXe8Fa0T4Q1ldB6yL1yJ8f6OaLJOYrmr2rRXjv9JxcaR9IiUXkDbaNbSoVDeqFI8kRhh9AOqe5UBn-7vT1PjKa92OAyqanzNOFLVq2B4k_oU5qpQEepO0Zs8mlUh4oy48OaQnGWStfSzeRzRmiYhK0x_m-Qw"
}
Figure 29: HPKE-14 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTE0Iiwia2lkIjoidFRkMnJ2aU5FV21sRFN2NTVpN2JwT0JrWWdpNW5ZdUdHNDRwdFJoVjUxQSJ9.2ysxul591qujybZjjCxE5HNT1bcvO5NWKFwnWZWYWu6BGPFA8CLS-U-zJb3n75IN9eV7SgtmaFSO9hJgvjFuQ0NsAzqkPf2YZHy68CSTbtC0jtYU3XUeGlnIZTAYbGzeN5dy8rx8zmtIHS5Kam4rGBXDcpS0yUQVHOFNQj2xG3p6GkySbhSTYVYFnpLhDGkVh0Z66uzxbveJ_7Awcugre6LLgBkKbUr7KVLho8MezsbigfLDCa2ZObwG2t1B_ggGoxPz5IhPpgc4bEAQ5-6a5jvehqPVwarNVfQgK8n2zrktPyZSFIFu3LSyCM0c-iSMsZnLLj6sxZwRygY1bc46Dm7V4NmUsNv6D7KAJ87QbOjnJLQSbQ6QICvvWAMMYjFS1q6HqakfRracY8ZkiDiGcGPF_II0jH3V8SXkkf0WFpaVIP8IhCFFgdn9ZI-3Lc_K0EYq66VKDwzxbzF0Y00KNcJRvUVdRAoSBrdoeEFgI6T6PKiJ7kUe8thQ7NPcvCF2ptIl-aydQyewxqllT73zO8Eon4gvEd3j166qvE5AOpeaNEPHOLZWiTisP6gJiBbiu0hiuw6qhEl1Duz90fc2woxrSJbRZ1f2vlgDBSCQC98Of7RDGOb5GDznpSSnIxbIqWwt8Mzo6HMo2VUpX0vLOkFDs1s4m33pUrLZsIAvDsVHl3H-EQRhLTGRdEW2I9SOwwIvA79bFhoYkRpbQ2SwubQt_h2fK5-JebPEhzhvnFY60OguXEV8NACx5YaMGfxnqsUrjTK9omnP2cge2Exvzyz9SrKvpUJOz5Zyp4zfSmwq7KN2PjxIPcD4r_28jUDrQMNMJmCJjSQ7RS2YJGT40Ve7ieYSu51dGVFIp9chVRrYoY9-O_nBdmqhWwEZog7I2y3Z7BpoBIHptiLZf0h1ihBnlOPuUyzMI3dfF-N1NA3kJMPKQChx5FXsNJc2IDD6BUW8hd14boiLZZUfE-HdS0Z7y1YUD2IxnRgoS3GFGl8CQ0EyT5xcG-1q8JonW_ZhT9b2rX9eWpmXBO0YM6sbAq0BpGWWlVlg-8SMMTPbqCBMQcSUG0Jvjsoq44qUvjVUwm5qLEV4H8-SojzloE5DfHoxW-Dhc1lzmEq_kswMxdMIy3aXrbw07TybmOycwXtgDtD5UO8CvAka0Q5xnTlykDapRvyvgadTtCcpfz7CcIzbX_BO9y75wQeae96xqHSB9939JSXM3ORu9998VFNvcC00J-cNsq0SDfXn7y2yq9LM19fuR-AKh0mnSR50m-RyjpH_KiHbo2AyTBtF_SWWYLbdZIuCY8c2Ogkh7CgvWUdLV9Az8STmhRTSbFAwKN3Iv4eSNzhykGck49CoIYx7tSMB2x8kfhD-9fRlPxwGPf8L_V52bOrTaFYrCSslvjDOM5LIzNoVQW5EKo190tWbfcV6cX_QLDDwKb5OpF02XkQ..xRIScEYODCA5phh6F5m6jck_rP-9rqvTCADo75FqzLS2XRoqIXix8Jr2cyfzqBhlf7jlBBzxWCDnghXUwKy54nntPXFXeulHZowHcR26ysoEZDJFni3O-Nb2u27ckoqV4r0-mqY7bwuZX19qcYE7WBus327bYLiybwdYGDuIEVjGwAJlBP_Jqkpgbrndp6LiLpI40kYVPv2pFvySoCgbTfyAGQb_BasQ013ArlJPjiRPgdDKaMCfprSL6W7i89a9A2T-LBM4ftKsewGW07dfL3SVigRsVXTS3fhqa9eEJb_EYhdpk8qLXHAhDsGO44WOjajBBRCIZPjb37Cn6srfjrd5-yztS6BT-izfDMpasb9gW4qj4Y7rJ6aLQb00NE37-w.
Figure 30: HPKE-14 JWE Compact Serialization

A.11. 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 31: HPKE-14-KE Private JWK 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "Qm392jPE58IbC4QZ",
  "ciphertext": "ZoV863wg-3Of_ya23nzWY7EvcRJoJKakaGXih3wJnO4cB6Cxlfek3nF4FyJGTghfUX5HJNofPm0WpKb8sCHVMhITiQ28g8hI800_jEHvUNhCzunkI9Ctc8i5CVVoE9ItXMKG72auz2Kj4HP0YZ_JT9t08H0yAaxLbKZTSPfAdxHZH3I1sYKzJIji649WvUi7aeLgFDiaexhwgfDsyL9aYv5bTtpCme69Y9cg8Mfa9L1xm_30DBPok5OvSYMxhaNPuoSzKw4Xao9b6yZWKeb300padA8Bwj_xlhZ98DxhLMi74cDcq9yGk8G3OscCnGouDDVvfzzW4FqynQIR-l5GGmQK38pdMNdIblJKZocKWqgi",
  "tag": "bsYCU3jisSzM0jIZAh1-0w",
  "encrypted_key": "HJZHrW_i_HOfTMNnoLwsKP481w8KQkskXbkTE7pABx_9K8P_JlGu7jlzM3HUOz8a"
}
Figure 32: HPKE-14-KE Flattened JWE JSON Serialization 
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.Eeao70gC-zJGPuXqXDVhn28jei6EC9A69eaUz8I7dSjdlyt-OR1gaklxtET31WU4.zQG65bZQO3k6XhCs.eVZMs6VJcFlNN29CJfkXuy4OYikOYxkMVghKUJRoWPbzBihCKjYOtLydTNelctrKqckrVhYttHa759LQKhixTBFAdfziO9GRYNtR4owGYJx13Y_uQei3KYlnImSG2VMj61YTQCEXFJsFjcFedO_vLSXer0f5yVVzEAzgLCEyvF6DOTty8TEMRBBLP66ePi68DzLyf_IlqwqiJNCu4y7M8L2dnPXde6UeGB7eg4y0h64uXkCV7PyVxhlo-JaJEt3-qwuXiHea5p_rMC4CR_WZj-ElIbOkgE0-eUQWilMuHYV99kZZD4nuFMGCQIePD7VJGJ4z-iuo3jOzNu7WL5MxrR8N7Xuv7qvMQkRy1wTO64tP.9_lf0eSk_Eh0JNlaWl6-dA
Figure 33: HPKE-14-KE JWE Compact Serialization

A.12. 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 34: HPKE-15 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTE1Iiwia2lkIjoiWkdNNk52WUk1OFdzdE1EcTdVX3U3TUVMNVpKZjRhc3dXWkJPeUVxVklIbyJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "tk1huQ0-zhCXCg1BRwtpo17mfD2e-paInYuxlhd_j9LIWN61jRePKsUDdORd679KI-WKAKcVZlj8AW0OM1oqq4RPyxSgT9CITmwgbtVN83iE0LBB-eqcVS-sH0Trb0w37m9WWDTymU1IVja5EPA5WiYR1Q_hRRsKxGNSy920JQrJ0QeueCbr7jdYvAFb-06uncsfoj2uxHog1FP_Cact8DeqI0syraIqMNC4U8xu9oeDICsgYKn0jbel3U7MSZYTi_9BBdnoB8M5xdPyvs51vNppL-5Ok8ZOIOyh3p9gz17Otm_o29Uegp5JQi-Mg1-_ETQLyE3NLQgTJbW1UMQiiIO5r7CXyAOeCYLsZAZBiJHVv-HZ6-8g-3_8q6EA-pKY601gV2kTEpbjBtLGyKk-wyclYMK-0xPbwcS3I9Cx_scRauZmjsYXKIJyeOyM5bU2oESZFLAeN5VuLPYYsTjraJD7VaV3VER7BC-XMhg0plrUueWHUy-agMgZ2TycyXIIrFbtYvTASDI4dXp9r58JWTRSVGmdQjRsh8lQNmbxbMYRmUqaRW8f4I9wsOT98C6snTW11Pv8IBp3OcHdL-oInkhZNcwhG3yy0EzDa_pBw52w33dvEtgKdbIalnnLCjWWVYkJHHl1wMoNFy-kJ5nptBEEBiY9evs0A7qCrOylAOYQcLpqbzG3YrE2I2gsOUO2Ggaxeg7yHT0tbBgH-MrYvNMf19ufHI6OdPM8SoUss59HutBCSPD4EOQiEgbDqEcamHaqJuTZPM2TC7qst973cZDV8WqZGLJFAc_b3RFaYTSABptLNnv1h9XgOEVJ1wS5DszaXtzmmXvhZM9GAtLcKOA6ZagYUL4ykJA1AQ0QTKzTm7RVxdO4k9FughbA0K4TG4Xu2bexHS7NmjHUvrpApvQDxtsaTH07MX3PkSCl8fxbYjelp_tUcqEwDQdnyjndkki4KYgvZ5gUONP_rd2CiI7WbsVzbiL1P9Bk78rTGIyEdEJwa5FAQXaYuZOyG3VIXBv1RlkDgoL6zh7vNaaOd_G22t7oTadgo8Zyp1LXP49YiaFFMsDZ15Oud06eU-a6aFhNLB3y4g1QJ4J35HF6VpC3eqxJ7HxX2pdiB4NFv0z9wzwkZIH0p9qOGYG5oR4oxap7ezuvqz9cffVHp6M6sETS0RucruV06rYVlkjwpgUhRhIVuZEilcqiiD807eto3IzvC0v6QGg2eK8sR0_A8HVN6Je2-faJDfuhFh0ZnzLK_V5gfZRRIiyknoQfOWXVMRkSBZnOizIxJwkhBOeactWWVmKduStyw58GDtJML0CVHUOIikxSxvDfigPJmdgJrZCNNH3alcgP5mGCXh6-hgbW7dfDaxMZ7zKhKGJqBGOMOyPA-Ij_FnKi6LR2WDmjq5XtSBUakYlKdIrtIqHpxuJ4Mjb-IUq5EpWUN5LTNlU",
  "ciphertext": "NzMOvDwdoFLLi-LuXHIn-zQqWgunj7h1MS-PiaK6Cw5OdeUFL66u1Zq1AG4TUtWhhonRyorEVy7uA04zh4vJ9ATtFbGpOSY0npnQQZjqv1uugZV9Jh1XHmSBtdSMUw46cgx5v5ocVA0LHZeyLI7fJ6_X-WQjlq0_BNAMpkWl2GXOcJtx05NRziEF2eIxsiv_ATayh2dXIP-CqDLrkMCJSoPqfO_vMX1q1XCv3w5WzqF8UpvqwwSXihcULDUccdC5DBi5VV22LN6egJtQS3fVAlNkuPPJxCQG8Hn_saAI8WszEX-HoVTsQ4wx9QBwBnOr4HCbgvetC3SuJREJ9gRCOAZ9zyd2B_OTofMbZatWmAqWzmrI1jgauXn2aimJjWmrvA"
}
Figure 35: HPKE-15 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTE1Iiwia2lkIjoiWkdNNk52WUk1OFdzdE1EcTdVX3U3TUVMNVpKZjRhc3dXWkJPeUVxVklIbyJ9.n5_N3_lLbApTmfGA9-SHVqkP9J-AxQnWWg7qOkIm4ZC2wPMqu8XD8fg9Bvmz6w_WC5l_fPsyCJLU0d50NweQTDN91xYbXWuB6KwBd_BbXojXsh9OXw3GqX3I780l_Yj2chHmseV8Y07mdkTRWFXnBjNSi1ia0D3ce48qM1tWp2HTQHRJ3mjtf6OBjlGvtFjvGhHMPIWLAHPNYkU4WQ2nAcVXXUoaA7hPUk6aLPpO9x3_28ar6UY12DJtwsuFa2vK8C0Oni3ylPbx2YAWUooW8gQLqvpjhBwC8mknFCcWU4DKxLk-RJQli6ryqAzJy_s-Rytv9_ukfL-stX4jwMza00bNwsv6jRbceEMPSEM4OJ0-9YvKhLK3G91--2g2tRxqCKQim24A5LEoNXJ5MVN6olkaYjh0US26Wf-yGaobnHRSLvlm-ktU0KKNzBDvcQGuLkDBByMQJ_a1iGDl8X0LS01JxCENRdarh__P6SkFvt4ouiKZVU84bntpBOhNYeCH_PBxF5bkpKrwMEMv5meR-0D6zqWqIPX6ilxhre9qYRmEvblaFXBjbzxm_jKB3BAOcY9fTHni_C6kzDzg7PoTFNLqSaNY89pq_jQvDm-dpBkVQgxZMW8CKNuWhMqxm02wlC4LmeYJDWoda5lqQuw4cvdEBm3EuWIkvr1DOuNiXiV0kaaUw8a63kFbwKWhshIFKE8CBIiQxRLyCB75NDD3K5q-NsyfP_KfPkYOhKBhMxDV3PXPj0GhLb_6HTzqNGWbpEQRDnxudyPy8LU9sMZSdL0Ufzme5zKMwTizZjhOWORHRUyOfxflyYS26K2Rwc0I3ZUnDd7Q0OPsDVZa_8hYOan9gq4GS2YTy4ObPDeQ6UBV0CpsCEgmBEcUiy_3LfVjUGzWQWR7oyvvwW-1GgkLEi9BcsMGyWU1dxRlmrgRZ5f1OM4fZd0K51MbdsOTzOf5yl7JDTaLd5rz22dfChrK7iXYDZUlFM3MyYO_qoG-pIbWDsRZF1SPtpstlsfTxxvRDmEYd0oiETBsm6idtqLU6oqD3MSsvOva9f25q2NHJjBuZJVhyLQ5QdhBdkznQVDbcVbNdn7vu2ChSklAMNII5Y-BVFPCmFZJ3GF2GEvJhMWPWgw-yl8GRDoGYrbqDDBEgIgsN_uDJIcOBcrBju13TrseXqr8e46ssY4NzVRjkI9KuXsIMyw9jI5ttJhpyCdT2m_on-Rsv5f9nCTjr4BdKMThQ1Ogsxe7_rwEaIbgOeCWf9zavPkP3TEYlgWZzrWOhVd0AibO2Qh_RDKhYCkVjGjOIsUsOraKLGcEAhW9cB7Co6ifH0SlCm6VZhy_ZJfAnd9EDG1gNG11Oif8KgriE3KJ20YHjZCwKsFwnWrRgO_ZUbemP2DwLATTqutPuoSmKTvEPPEVhU-GhaX2O-MgieBhCz0Qf67hmIqx39UgrdM..7ETL31NQ83tCYCBLxe4m51PIQA-1JCPxKIreIFJtXx7f3zgTLfQKp7mu72nht2yiQM7HW3yEKr6vPRVH0hgWaltnGXYlSrk3S0oCP1yHGmJvdhszVZFOVW6ioVF7HO2OkcXoGoMQF-gbwwXhdi-Z9FOlZuq-3kX0QzPWDMwkI3BiaKhx8XZYFA9IZv76YWpeT9b3X4vzPcchgyV3QsJWSX5BHg0b-ZKLEyZQD4bALbC6VbF_2gQER2d31hfVxR_LYaz2scGTZLzk-f7rdl2C_x5szBUQlKxLWo972TB3InV8Nzs5D1NBX1VQtSfD86rYV4GfCxen6HyFkBkWqmk5DxIEcvlGG2panmqpX5WxnIb_l14hRJPfvfltyiAJOm_cEQ.
Figure 36: HPKE-15 JWE Compact Serialization

A.13. 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 37: HPKE-16 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTE2Iiwia2lkIjoiSThKZldxMDdheTMwU1lfQ09IaWRRMlk2MlpUQThqelU1U0thTWFnOERXcyJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "f3DcymufUI5ucpI0ZfK2ciQdM_9oU1Z416q0ImGiXStD1n7MlW7C4QwiUWJY9oLBzLZK42eZHDC4SF5iNlg3yPfBn0CJq0mPOMyxGNh7H1AtgmoG8EH06kABYsomalrc9IA5CpJFYgZYSMHXkadOJLRjpfD0IxR-lRJX9PStSPNbOLoKSmGQ3HxHiUKdk9-ygen-2oWZeIxu0FS5554-pI4mnqAphra3PppiXPijO-8sgmHTQI0daF2vZKIhEpyxVJ_vl7ONkW-HlGO6ePidIEVLcS4axd_AHIb8IDgRpRKKCLddmz2Xro7tuVH21Yf7w9YMHoGnRZ3lm5k-H9Jyx86AqYmd9ZIIh0YOGl3MzlVCDvwPUdktqj18UpA27ytrH5b6te6O5MOOt57TtzkvE0YlgAQDOWrzExo56yV2j-kcoc5OCV8h_sqx9mnFK9psyloJwuzMtvxv_LiuqMyLoSXFVkrDkGEDFKRRjsjSjYISiF1GaUY7-I-GwPhF4lsEvm0tgCIMB9OJv1eFzdRjbHG5GKKW7-wY-LshdKd3_wrRu4O0P_0yqQqyro7sXUnZ0jp1R16rkBbWrD2fxbVvADCdTHOPts5EH2UmoYMK5KHtm0lLkkd7wJsfS0DZkOIN5oXyZDABLuyUa8Vs01vFgljqyCE0wKUJJwuftCpz5PMc43E2KR1KnNM5AB96zE_-6-1qXsugupWB4dK193XSHbnDS3B-k6JIthjP18lz9rIZBqbY5WPNVwlVqIsIhIzpkHS2R5SB1LkpY9cDsNRz4deQUuNEPU_kUd7M9PacX8_-eaXUYfLUVP6jEWJOz5CquGVQ5m_jBgoP6awI9ob-VUDJic5bgwJ00Uu3gzxLAjpjRfTsYwdYPHqr-70or212AZqT_Quplw-7kBxkgQ4d66VwFR_ldmwfBCzMYG96eIGg8sYPhkYBTXXnWZHw5uHXNMFonkblEVHDm364VN5Da6PHaPV6X3xZK6BZ3ldfcmb_twnLOu5mjubemsqU2lPhIk8NhBjcuLdBNXxcp8rO9bpAACJgqgXssKqoL7UQZYtmBZK8xxvdha4eE6mEuttDHzavBGWIUDpBGmne72jboM5rcaKRVh2h4btnQrGglUiO4hiSILBdtkbPijERMDiC84yKX447_gP8vLe5uZezZ9Z4OKlIIyMQIPioqa63x_BY4UfJTAwL9IWoVmWHHEfd3wq5vLcxhlYwfsGTC87y4uTPaotC4q0y4szChhORuMA2yIsrIp0KzWZPC4OpsNR7-HyBvB61EzTJvcnPRbqhnyNrVo9GpNF3wm7pMSAUM4fmbMXBHmaIEGZT7hUK6lGeYrYENdGGl9EvnlK9SA-RgR60ZssyifoVg8y7PwbkyDK-h0QVPLNVPt3HRgWZ7q15hnWFcZkU3EEr6BXYAWpchPrxjmE5VI-XeQTfc2wJxPCk8_Ra25ruX3z-pZCbWwwgyOV7E2SYO1SiigfgUUM2XE1QXhfPGaxgB9tjyZcBWSuLL2hmyCER0DOvSzhKf_cBPPrpJbsa08jul4kK0cFleD7fvprHoZTP5QHPuOZWOjSFEnN6L6KMHF7A6FERuj3Y3d-EkBvDYuYmp_kUEKcqBzu2MJIs-SihssYFrB_jR8TI2nT2_t-x00-czqW9c7f-vsxRnaQ35e1gTMxaG2E0qamjSO9ojeHvZoieE-6YFxqhl2Gvg6V5E9xb-KqRfLpofXFChcmyqK2UkYnv3ucusWuRvMCSjAo1ZWsLEpZ38K2J5OX0JYl-sg-s2qprM38KvIj83CiR4GMyBVq4uz2eWwA1hyC70pD6eg6Bf9IGVSsiHDpZ_aZZ0gZl5Vfh0pzz86mXw7HVBW2IYARtXtQOotx_CWHQXt9ZNPE2oVMNKD5rEQr7fLDptiVN4vo-NDvRQ6ukD3dD7uglMX7S6GiqWIB1TAlOXxUpxJ2KOTYUZxdNS_l1aJKvIZC24b0PUbAgGk7hxbQ-pLkstbnndfjqJfrzwgdwvyJWkS-zSrxhjVklRgmVY3t1XcFAgh0HW1MrW-WJo93-OWmov79eqS1Px59t7rXfoIMnX-1kPzV8EeQ",
  "ciphertext": "t2AwGAHfPThbGSX8kxK5ttntq4BrKwF7MygW7Or2uwyYsrnlXX0z7igjZMJKt5iOn6ZEEUnjcbpFhK1SiF4sxGFz-R0ntAQED6wP-qh8HC_GOOoIixxlWkpvinCU7Q0jGz2n8kwG6mwb_5F_OE3U-izHkGPf7Ml8IyYUdQWSb-1fSlkpjdiJrohCRLXc8DnSxkVt6T_tlgjZaCAwAHSXeyYJteXWhzWebYDQ5RieOrzC20oHlQpSJjKqIMVpM1tpe8utgNcXNXU5EyU-jbFn9K6vuBwAya9Dtc49k2fgNDtdH6GKDlfGly1hxC8LyEYt9obHbDAOVqlDxupP_OD5eOy6Dhv-8ob_P1_6XSH2FDlfaQV1noeRyFEYHuSrLHcdUg"
}
Figure 38: HPKE-16 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTE2Iiwia2lkIjoiSThKZldxMDdheTMwU1lfQ09IaWRRMlk2MlpUQThqelU1U0thTWFnOERXcyJ9.X6Dvdxl07EhSIKAWBinqGItCe2KQJ2Rn9DwC4l3oHuIapTPk0I3y3rl6OHOGU9MNhD6ONgoBJDF8HkSQJAYTM4cHTkyn4k2WKa4Tv-3I6M8irsTsc8GyBMJ-eHO8tDXHMps4-Y-2DLyPbeBe-ZsOFGq26RRpjGmWk9gcs7hUksZyqyT6dedSGsK3mp6QHuJ7atkFTEpvL6eJx1pojHTI8ShsoHH9WVeeNDMrgqSb2NRj1ADw_P_nMUoCohJjsL35vJjUMnk1cpyqdhmVIeh4IYl-vaieYDskLpT9AfPD0NAhaRXiSE4W9FsWKudXGqwMgQTAWWqv9Gz_etQrqu11rk15g80Rfb8Ma4Tek0KpPp9nFYu70ZincXoEGcF2Ji7NLCiGYYwHDRw5uWzIljB1GPG9upj1e29fsKOGuQNq23HASQSs-_pQ7HXun1GLkFzSicXS2t_ShOjROf_UnPFAaEjeV7Phl8o01gpYBAcQh_3ITp9GFyRFE5ngYAzh6NiZIs5xkle5lR7iANS3rb_OdlgpsRJb_10D5ixzcfX-0NxVJ64laBUq16HUmjf8nqaJx-lUTaKiytK_N6Mo7Aw18t7nO779BesZXID6YdGU3MjG5l5S-W87cHLmVXqUU4WZy8A22-patgaXpdYAuQB0JFKhj3EYBeB-bmtDCjubtZisZFyla_FXd1ldh9OvKBh3gLyUn85NbK-fgp1ZDszFsLQZuxfUYN8WUywqIqtZb53pfHrCiI1cS8yxb3kkSvTXCP2iHC85rWy6IpqQD2b5J3TLm7ZGittNTZ1SPj4EZjjQgrDBHw1UDif7ZnUZoyxGbhQF470pJlkAHuN6cnwyMKlFrd7uWM-0kGcO_96RNy3R8P3lCSqmGC4hHjk5H6PjRCWYtgi-eggXiZuk76euk_Y5s-r1OfLmcfbYGuWVydBH98MeG5jlWMj0SCi0jPOHSBkWbI7UOS1xqwrAOxBDt40J0Xq8t2sWIpd_qSKB0ljlstu0-jC2-uASa0ghbt4z0c9d4MZxLByrHbds3j5a-YIjIyTJZ7gk6dSiz02TbWrj8hcqw6nCP_em8H2iuGdnb3dTglhQPIgdan6MSuLd9-OHnzf8GKa6ogcEpeindmIkMA2oDqvxbmcwT-kr7X5u69KZmuExEXwkIWexCoKPZF6etl4y_jtpIo_f-1XDvEBX1IQsstUbmHlwSqhTROfDuUO09cHdpYJOkjHND464yuq9L-IC6ALoL5Sqdbv9FWfVwBGQv7KbBGAr64YGm6rufgxlgKrKuNbu2pkO2samrWCCHlA1q-w0YIsN-hFPZXvdfZ3X5wa1CXV4yTAkqVM0uZQxeYJqCl1Bo64hMkOnf6kPE-IeVt1poUIaDfnKBUCUbp3Aue_ZDsd5kySeeRVY7o1-t_KbdRX5kPio8hTB5Q3TuUONa9cxoSe0pngOa2TINKmE7hRjPg9eu9YuiDoSGBEd4JmftCZX3R0o4KVTbit_TJJmPWsCsk79IrugW5nDB_OuB_kInt7_Q2TvPBwJaGSO2PzAyekG6lNAtG7fVtuBxKctk-txfjdwdmP2usFQLhpRX6CKNwlvEGSKa8Th9_v3twZH489FBJyQytKho-XRi0RIjNGRh_BSOSMHXojjIlVVKp3MxWJS16ZG02BZZ9wkHoptxJrEYp2XQ7GteM44T1KcK6SVo6gIJGkqUe0QdDGJKTVJzbuM8MkerAC0lsyaVwTqyrJcOfBOPCxe2QUC_SXUhi2oOKNKNN7E481ZsHiN4Z6qlTPFol1Cj4gTeJsQ_iUNDrBGITgNxyEwr8KNSG6DqmXBjFCUYIbFu6cNkwbGdfJ-gx5LgPZo6xi0MvK7V3sLfmvxHDkYzawMtT7oJOUCLx8E_eTGqCPVuAyyUk6MOesl7mY-j_djkuwKnbO1OEsCd0DJgYXHwMNdaNGdUbM2H0QdslwaLykT2ZR9lIfWIkWgP8v12SX22Bcf-fYuLv7OOYMJsyJZ7XmehpaGzdcwMhKfJIxfkx9ct3bQoBWPnvruibfQMoyb_2bz8mOLZfthUfSej4f1-xj6xEIO3BDT92JwHf1XneYMxcM..bwMbalCdoL4eMoEKWwjWGjNy3PU8pZ5z3fi4_CiHMYIT_2BmsDboxVMoPkOh8RDpe9Dke2haz18GAOTbCvgyw2TUuWrqNQ6385oGD6d9tbhgxP7eJTsKDC9WxgHOxs6QqPrz6ik-MZPdgucZlxMeAmlxzKyWCKxPcpGOyCJNds1ZXLGorcKgUH0GFBPPP7gikHcTKn8GPQAvp8nUOj0XL-PMI3AvDHVcxtFsFHFoqz45u0V9xghsv-Wb1fj1KlqRSZVIozfyc0YYryHfWmln9LMSkR0qLvsngRHHpzh9APt7vKSJV7UC1nSz2kyULaGG6Hmuvhk2J8AcLF31HJC5byrVLIA8mK9mkDA6gU2SbG6wnlXooOGJKQMTjGoc_-z9pw.
Figure 39: HPKE-16 JWE Compact Serialization

A.14. HPKE-16-KE 

{
  "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 40: HPKE-16-KE Private JWK 
{
  "protected": "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",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "iv": "_xw5cC0eZKNDpoGQ",
  "ciphertext": "URMwmQ5oV2ApN95MQLtBdjRiB3z6e4JkUZBfwBLjAs75X5Ptj8rBkK7NI43Pi4I8WYIOjV1eTdIuMc2a9bI3ihuJMjEZ5ZjZs3BhxgIFp1RM3qemkB0UYIOryGuaRKCoQAXt3yi_4XtAN7Qo0MjEECWJitCQGA6_NJrgoNd9AYBJGW9dwxsTEm_z6AkuBXlgRyWlpx77JDfoT80wNfWkZ0cZfnxCXqpeJ3HBca2n-nvLgeKF6QZFi22R7jhCQDjIfr5bD6-cFmBEVopqBW0sHgn4l3scQmPp0UVSNyQHMjDtQrvdqSYR5mdgouCg2g1W1oP339wco9YWhekkVhxzaDnbFrejZYSLADPLrMvlevdT",
  "tag": "2kIod7AUtBqfXNWHDl5yng",
  "encrypted_key": "qLzKoDqY98pNuWha8eaFD3f1W-VfA_0cTFihHWsyLkdKErpaR-MS7PGkxeAQAEyz"
}
Figure 41: HPKE-16-KE Flattened JWE JSON Serialization 
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.9fIUVkU54K19G9RwkA4z1N0Ysnc509NAMijCu4zU4Sn2IQNPSu0Ftasi1BsLh-Ja.wPAp0PIht7rb-5vL.Zu3dVqpJ7-F6ldio5oWPFx741n8PvJNuBTJLlbPLj1PST_U1_cTuitRNugKKTT8qO-n0n6gyDt2fTujXqs1b5srj5I8n3DrArqqRkC8U2D5DRQWfiWHFvLq6Ykc8YDjvXMjcsfTgR_RAhjtlGJyZG2_ldxSlzZQPD6ft5hqguZ4yKnL8SApjwgVvGKFBi2_n9jIhAdeFP5iu4LZ2rlyCRaJ3WcmeVluRWen1kFwynESCpIUkaVoAdxhBCCpj19G3wuy-k-eWN2_71VnvmD2q4ElswCIEyIZDNmN9Twkrkd99z2JoKkVb24lScEC-08zS287n9IIq6No9d1QXrQHjtuRNEPJkrvK4kAyWgmGHfU4L.wwiUcQHUmWs4nQ2b9wEtSQ
Figure 42: HPKE-16-KE JWE Compact Serialization

A.15. 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 43: HPKE-17 Private JWK 
{
  "protected": "eyJhbGciOiJIUEtFLTE3Iiwia2lkIjoiUVdaZGtqYXNILXFySWxZVzFmSWswaXFmU01KUUJoWTQtRmJiZUlNVkVyWSJ9",
  "aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
  "encrypted_key": "fwkeYjc4O07qpD2-Lxh_UEyv-xo8J3snbT2XWaWyvt231n2PhK0VYgXhMC941vKTlpXVH4CVt0v6GQ-IhNThMJUaED73T_3fmJU4hJUJCmlFP1LLQF5eA5TP_8qWfYt6KSs8uB5vHOx_bzQTzb9Y1ALH2_d1aYu5ZrlyL-TkODvCP7yv20n_AP03tkpo3jvB_jTbt1i3CP_fe6Lh6bxjrmYi5v9T9ZvppkpYy17McDnimqcepv4kAjHX4xKbvVakYspz-Dj7SDeUGGdCfG1fWz1ccksKT8AfMNVEKuhWYpIpD5tSXfrdynoUNXoVgbj6PHYJ8jILncdN0GgnUrJhsQ3oIyJIKD7cAKIQOjdrQtm2SEpX5EVa-YzcK7RNfMIEswPt7wREwfMMOMsroin9cR4_XvvI5o3UPtOaoqlOFha_9LKHPWdIrZd6DXNA3C1eTgpfRR2PiEUnGLIkY78OZ7Z-Vr4hTqcHn6Ca0wzo3PEnKV1AeMbGxtEaZ2zXmSegh1-x9AyhFkkqkxfF5xWHj4VEVXfV0JmkaFY8XyYD2RCUcpcwVbEYOyU_aj79SEVhdSJHXhFEppyO_Ljlo19BgoSWPkOWBK1A5TsAzkxkmwzk_19BX2ElrFyZS-oEE8mJoxZsWkbUe0oQ-CmGb8RC-TVvILoclVBqMekUenYoqrkvFfj_LRsRMrDEt5aBjCIk07sSyw1pzkHemgHn74vxnSmHlsTzG02cMW6BMLV1WgFfpDMg8e1ayxIvZ-f8ybE1GlloNuOlaqXAnYc_PjXAZ3bShgFtCAgHTXn1EGEVrBwWREWWeCzN2J_oatBtphHAtUAt2wPf0mAU4m6QeynRQBlkQ9mWv0GSg1TMLVd3HOZpKfAJuKdYgYmJoMOahlq9Mj3gnXPxk2FHcDJshlWKQRyWiEyIAEYrlJHFA1sa0bflhxXJoTRYv77_KSmc9XqWbVwBPeWCyvm2cV8gg0OXhQolmy_o0HstzNzw0HO-ulzEmsh4Llfqtw863MxtM26_YY3UT0TWES07dJkzQaHxWqUu0Is1YNt0cWaGawaTTJyFRT8cj2NwPZLcn1AbJc041-0BEk3036f9aolAhux6rsSKRqu7rxGpea7HhAYOgY1MCVazUR4FhPwbmXHnq_baFN0F3T_YUGVeRXNS8Lwu4VICXKA99mkH63htwlOMtzuV8-b9B54-xGoSmqTd5p2ZQsesjzDWLGyftg2MxISSWZ_SDloXTTuu7P0e48ruqwiatLaysy4qdyzdC7YRQtIXBlFernVFuKEo-sNuvzgkDMQWCV_6rjsN2uG_B0wCe8vEB1QBQ1QoGHrAlFtBX8FAPs67ra83FmAGSbr6uwxydsHOfdbdujYAXCttwYbKb20BFXOFrBKgJ2dTVy9xvEl7tpqGmJsYztNWZWlp27FoY_ZtfF9Ye5nzPnm7SN-26NgELOQ2UyZSTsUMobfdNwG0PLV-DX2x6kQOxnUCb07F3SGTE94zhZXlRkdWHkQUS8bUuDth1OOKvXN7eSkP1fHgyd4uVIZeJFYVxjIzFVj0f5rbNGM0WbRF9sgnC8zMhyHFxYRgVeMBZOE2wrHvpopcSNI-vXpJ2HRdQ-MMmoBTbaEL0BgG1HomL3AI4WaThNPibM8DpAfcuTGZLfQ5p1XvpFJSN6l9_19dO899TCrQPq2TjnZaS0FXqjOCazBUtWGrJ7FEqqwn4NILZaodd-gGFIiKpngjHtPd0YZ1iEjK8NTKVWUYCgk1pUKhHKdmL6VpXGfCqKU5QHY3amv2CmANhmLEiPopj0bue7TtdnfxGw8AFT1KLKSeXJIzN6L3S3IQXL--D7Qy4rd29gOYAgjsJgLoKPl5QBR7y1Pg_dGmhkKoBU-jTwqI3B_yEX0_lNCUG0JUAHSjlQ8LS1LK-u0Y46S5vCyhOOKCmd5pSbwUUos2sOep2pqRVyBWvBFYtCqYg2nLojRZeXCXk-Yz3PI6qH1Gd67o9FUfl6gqR7icL8xVpfyZNLbQzDUMnFeOlkKzK3lxvLbNUvDjLRluaMUC16Qm4p116JSm0IptdbowcOIKkJV8hifbAkKdYSZSZUE",
  "ciphertext": "YXv88L-bkgp5FaUJb3fPl9MAXBk2Q5_H0vgU4APLsCbdRvn--ZbvWvXDuQe5ueXFHd0djwOSDbCX_ZNNHxLc7Yk6fUK4KwiGBRfNAN557eNguypIgFyjHdcJvS3PWs1MGDUBuiu_y3CpHqjV30e_twvCSDiYDFm90wSiyNsxHjqdDjp4BK8V7-V2UK96kEN58UUJzZpwhdoXqCSuNo4eLTFpXKKPUdOL59rdYfPGWTXEF1NG4GT1g4BlTI5ktM0umnq8ShpXjAr9CjrasAprs329V3Nry2tMvY0XNc57c9P-ChBRM7u97JEYP1aMdQbqTHcew0-oEzqO2ZB5bi11kBIDV55rbYK3jYgUAQP0ksWlLm5u27bsECk_gavvc4WJ_Q"
}
Figure 44: HPKE-17 Flattened JWE JSON Serialization 
eyJhbGciOiJIUEtFLTE3Iiwia2lkIjoiUVdaZGtqYXNILXFySWxZVzFmSWswaXFmU01KUUJoWTQtRmJiZUlNVkVyWSJ9.6FJBOFFK6ghgvn45ChsyralmuyvCL3I_pz4yQToMrRLkzcj9PtmBNTpICuPoWePw0IpwSZFWOezc3y5nLrSgHA85o0EtN6AV3tlwRSgMW0EDg-aDPrribypp16Mc_wHNPzq9umC82bltHaGRY4w7qJ8CG_cU3JhXXiEyaF_j0KR0z_T5qQCu-Bfks7tnBJeovLwos-WyX6iAEe6_flZAymAsDdYiDtris65SYXsT4h8d8i_UnN2krcrhTIrbQ2Dj-adBeTQIz7esXq77DLvpU63HoJWO6J-zURicU04GTuIZwJ-E6qIvdKhG_m2c-5JxyTYaUd5zXXmS3e_Mdw2HTzEwIaXHfT2RS0dnNDksua7_niTfPH3dI8PutJSLITJrymtgWpqi7FgnUimSwaKOtgwrpBH_wfCqYJYSOrWKxMu_wg71w2lMeeKKxSMdAdMhOQBpu7p7rWS0f_mfQvnbo4K41hFa2DrUYn29fE73GHfkO5IpSfUPm_bXPQunJ7GgHdZEsDNJD8ctYkoKS1IaMtpD02fOmpk5MumKImF2_HEZKKn_fiqUE-vHG5jNL7MDPklNd_xpSpg8Ry3Fe9_OzuuwgGbOvj-Vhs5dnh9NyMT_HSE851jUzkr4GOgoH-NrLBmbJyEGs3_x8G4yssJFYfKkamrj1dLjlx-WPff9q1RY12ejEkZHwk0EJSroiwzQTjs229XQxUOYP5MNirti_5VmkQAGxfcuQTbjweXwf9O8rrt0O3IqxhJjabTtMLxCLEfRKoHrCIbGU2LJ4h5ij3PZxI2RGs_fNIrwGLnztcuM--sOGfBpKaUfYAFVKO8VdWTNuJ2m8C6z5LN7nNQz39_DrFqorcmRQkhlx-0MUaUAuEX60SCz-2hiNEhl3Z5ZWiucMCmWNrWJqZMksXryWHEbUxZUkDlFU72ll9js_CQext-vxsyyk6g53fm1LXo-rscgDCT3MtxUetUmtXEOFSAQDXy_ktmjRgkU8AeNxl5Bq6lq-pon-2YXafkAtmfmd-0Z2NON_Qq7UQdAeGpmAkbd98Ma0GuMUCau-TE1clYJTlV2Ehx-o_ol38nK2GeKw7N4sQI0wgs1_1l4dQVXS4LGTgzZ9uep1szuaPAaOmiEziXr6CxknW2JtgByjPUww0811e8F2eQXlVP4404XwLyhfCnfve9xS0qg463UaxKk-UOyQJYhQuDCYvRFMOaReGWgAadbJX53g2CeWPVMNAdezCNuLt4UL18_8AsfRFMiDPOIujeqb8Z5nNeiGGWyKuiO32-PYcg1lb5ljDx_OTmOA0LMePhEEweKR2Dsy26Vy1_F6XdpJi4sScQCOYEne7s7Z2kyO26ZLSR6T3CnQjJnS5Cc3gc6K8FwcrVvjIr2ZYpNVRWFKBzPnVmye6SSqZTft4kEPpTU8D43-3tsiupSF3s3B_8as4c_4I1gOvItVcmUzsILUM-d7dnTDlXlV5tnyiUOCQQ0lYv5dfZ3APpvgtPhcBehp4p1NRamhAuGD3R3J5G8JMqMz7xcWiUirW-I2hw2wStRPvrqKLGHUYJNvWS2rbluqWcSHdzin9CmDZWiKU9Mc2yHx_JA-kr6i0LoTXj9N50mXJQWYPuYYbLptqOFK1FRGohsgE9I3YqjwqjphUqgIZaE0gPz7MnZXk39mH_DfgWR5oHQq0SBWdX5uPFyd_kk5qWPy-AsNVH1cmfgQN4KIJ43BGtYOQ3LqKQGi3so0qR5h7vS6zTaVmRn5ULvGb0Byz11fU2XbkgWDTGLULSJe2peykrumnArREAUr0vCcMpXnfl65coZkbh3JS7wRtTVv-MpOLT27dyPmuOI6gtv8j4WrD0jvkGwbRahqsbdj3pYWCEC4h7iz65yRi2mObhEPFRtZZrI4Pc_3FWCL3YYu_oBilsD-E733p3WKp4JR1ZoDWIP14ViNyhE10OaPry5Iir1uH6FQbEv9alb0qJwkZ3oWrGu5_aLhmsNKBajVDspILqqPgyshSpfoRV7K9E9n37boxfrFy2mPew7yXwH-78jKOLXDwjFlZDd0IGE6utMvV3cNsuL823xGDIngwxpVfrOeWb0XGI..pBP44A3JFlU1WZ7uZbtG_vmEZN2CbCAxtnoVwyvacH0kGYnOO7i-ziXuHD6ldfBI8QZU9EMvUWR9gBV0eSRokFCQyRicKsm6tT-havvKMKMdTRZK254hmqoLAeK1nSaL8M2ERZYSIuOEYKfOsJBmuHKpWqZNMvyhNpfv9p61E6-ZjZs8TMGJQDPXkjg8-1Tff7FhmuqnU-a6bvccVnjAYJNUiIm-ALp2RcjEkfYo3Ifzs_NxIkA2OQ8RQg4f1LunB1g-Yz0LxUkhewLZ2ftOXPFDpWFPEAzr6gLaKaR4lJO6G8q-WQxMH2xgh6UjjE3v9w3MIIyELx_t95RNKFwkLjD2w3gCDZ4ShEmF-3oBF3lgNegxbyew75lKZTqa0uHXlw.
Figure 45: HPKE-17 JWE Compact Serialization

Acknowledgments

TODO acknowledge.

Document History

draft-skokan-jose-hpke-pq-pqt-03

draft-skokan-jose-hpke-pq-pqt-02

draft-skokan-jose-hpke-pq-pqt-01

draft-skokan-jose-hpke-pq-pqt-00

Authors' Addresses

Filip Skokan
Okta
Brian Campbell
Ping Identity