JOSE HPKE PQ & PQ/T Algorithm Registrations
draft-ietf-jose-hpke-pq-pqt-00
| Document | Type | Active Internet-Draft (jose WG) | |
|---|---|---|---|
| Authors | Filip Skokan , Brian Campbell , Hannes Tschofenig , Tirumaleswar Reddy.K | ||
| Last updated | 2026-06-09 | ||
| Replaces | draft-skokan-jose-hpke-pq-pqt, draft-reddy-cose-jose-pqc-hybrid-hpke | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
| Intended RFC status | (None) | ||
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| Additional resources | Mailing list discussion | ||
| Stream | WG state | WG Document | |
| Document shepherd | (None) | ||
| IESG | IESG state | I-D Exists | |
| Consensus boilerplate | Unknown | ||
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| Send notices to | (None) |
draft-ietf-jose-hpke-pq-pqt-00
Javascript Object Signing and Encryption F. Skokan
Internet-Draft Okta
Intended status: Standards Track B. Campbell
Expires: 10 December 2026 Ping Identity
H. Tschofenig
UniBw M.
T. Reddy
Nokia
8 June 2026
JOSE HPKE PQ & PQ/T Algorithm Registrations
draft-ietf-jose-hpke-pq-pqt-00
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-ietf-jose-hpke-
pq-pqt.html. Status information for this document may be found at
https://datatracker.ietf.org/doc/draft-ietf-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/.
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Internet-Drafts are draft documents valid for a maximum of six months
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This Internet-Draft will expire on 10 December 2026.
Copyright Notice
Copyright (c) 2026 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
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Please review these documents carefully, as they describe your rights
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions and Definitions . . . . . . . . . . . . . . . . . 3
3. Algorithm Identifiers . . . . . . . . . . . . . . . . . . . . 3
3.1. PQ/T Hybrid Integrated Encryption Algorithms . . . . . . 4
3.2. Pure PQ Integrated Encryption Algorithms . . . . . . . . 4
3.3. PQ/T Hybrid Key Encryption Algorithms . . . . . . . . . . 5
3.4. Pure PQ Key Encryption Algorithms . . . . . . . . . . . . 5
4. JSON Web Key Representation . . . . . . . . . . . . . . . . . 6
5. Security Considerations . . . . . . . . . . . . . . . . . . . 6
5.1. Security Strength . . . . . . . . . . . . . . . . . . . . 7
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
6.1. JSON Web Signature and Encryption Algorithms Registry . . 7
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1. Normative References . . . . . . . . . . . . . . . . . . 11
7.2. Informative References . . . . . . . . . . . . . . . . . 12
Appendix A. Test Vectors . . . . . . . . . . . . . . . . . . . . 13
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 45
Document History . . . . . . . . . . . . . . . . . . . . . . . . 45
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 46
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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.
This document uses the terms "Traditional Algorithm", "Post-Quantum
Algorithm", "PQ/T Hybrid Scheme", and "PQ/T Hybrid KEM" as defined in
[RFC9794]. The term "pure post-quantum" is used in this document to
refer to a single-algorithm scheme using only a post-quantum
algorithm, with no traditional component.
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.
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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:
+=============+========================+==========+=============+
| "alg" value | HPKE KEM | HPKE KDF | HPKE AEAD |
+=============+========================+==========+=============+
| HPKE-8 | MLKEM768-P256 (0x0050) | SHAKE256 | AES-256-GCM |
| | | (0x0011) | (0x0002) |
+-------------+------------------------+----------+-------------+
| HPKE-9 | MLKEM768-X25519 | SHAKE256 | AES-256-GCM |
| | (0x647a) | (0x0011) | (0x0002) |
+-------------+------------------------+----------+-------------+
| HPKE-10 | MLKEM1024-P384 | SHAKE256 | AES-256-GCM |
| | (0x0051) | (0x0011) | (0x0002) |
+-------------+------------------------+----------+-------------+
Table 1: PQ/T Hybrid Integrated Encryption Algorithms
These algorithms combine ML-KEM with a traditional elliptic curve
algorithm in a PQ/T hybrid KEM, 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:
+=============+=====================+==========+=============+
| "alg" value | HPKE KEM | HPKE KDF | HPKE AEAD |
+=============+=====================+==========+=============+
| HPKE-12 | ML-KEM-768 (0x0041) | SHAKE256 | AES-256-GCM |
| | | (0x0011) | (0x0002) |
+-------------+---------------------+----------+-------------+
| HPKE-13 | ML-KEM-1024 | SHAKE256 | AES-256-GCM |
| | (0x0042) | (0x0011) | (0x0002) |
+-------------+---------------------+----------+-------------+
Table 2: Pure PQ Integrated Encryption Algorithms
These algorithms provide pure post-quantum security using ML-KEM
without a traditional algorithm component.
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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:
+=============+========================+==========+=============+
| "alg" value | HPKE KEM | HPKE KDF | HPKE AEAD |
+=============+========================+==========+=============+
| HPKE-8-KE | MLKEM768-P256 (0x0050) | SHAKE256 | AES-256-GCM |
| | | (0x0011) | (0x0002) |
+-------------+------------------------+----------+-------------+
| HPKE-9-KE | MLKEM768-X25519 | SHAKE256 | AES-256-GCM |
| | (0x647a) | (0x0011) | (0x0002) |
+-------------+------------------------+----------+-------------+
| HPKE-10-KE | MLKEM1024-P384 | SHAKE256 | AES-256-GCM |
| | (0x0051) | (0x0011) | (0x0002) |
+-------------+------------------------+----------+-------------+
Table 3: PQ/T Hybrid Key Encryption Algorithms
These are the key encryption counterparts of the PQ/T hybrid
integrated encryption algorithms defined in Table 1.
3.4. Pure PQ Key Encryption Algorithms
The following table lists the algorithm identifiers for pure post-
quantum key encryption:
+=============+=====================+==========+=============+
| "alg" value | HPKE KEM | HPKE KDF | HPKE AEAD |
+=============+=====================+==========+=============+
| HPKE-12-KE | ML-KEM-768 (0x0041) | SHAKE256 | AES-256-GCM |
| | | (0x0011) | (0x0002) |
+-------------+---------------------+----------+-------------+
| HPKE-13-KE | ML-KEM-1024 | SHAKE256 | AES-256-GCM |
| | (0x0042) | (0x0011) | (0x0002) |
+-------------+---------------------+----------+-------------+
Table 4: Pure PQ Key Encryption Algorithms
These are the key encryption counterparts of the pure PQ integrated
encryption algorithms defined in Table 2.
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4. JSON Web Key Representation
Keys for the algorithms defined in this document use the "AKP"
(Algorithm Key Pair) key type defined in Section 3 of [RFC9964]. The
required "alg" parameter identifies the HPKE ciphersuite as well as
whether the key is used for Integrated Encryption or Key Encryption.
The required "pub" parameter contains the SerializePublicKey() output
for the corresponding KEM, and for private keys the "priv" parameter
contains the SerializePrivateKey() output, both as defined in
Section 4 of [I-D.ietf-hpke-hpke]. Both values are base64url-encoded
(Section 5 of [RFC4648]) without padding.
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.
[I-D.ietf-pquip-pqc-engineers] provides general background on the
threat posed by cryptographically relevant quantum computers (CRQCs),
the properties of KEMs, and considerations for PQ/T hybrid schemes.
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.
The PQ/T hybrid ciphersuites registered by this document are
motivated by the PQ/T Hybrid Confidentiality property (Section 5 of
[RFC9794], Section 13.1 of [I-D.ietf-pquip-pqc-engineers]):
confidentiality is preserved as long as at least one of the component
algorithms remains secure. The traditional component protects
against unforeseen cryptanalysis of ML-KEM, while the post-quantum
component protects against Harvest Now, Decrypt Later (HNDL) attacks
(Section 7 of [I-D.ietf-pquip-pqc-engineers]) by a future CRQC. PQ/T
hybrid ciphersuites are generally preferred for this reason during
the transition to post-quantum cryptography.
The pure PQ ciphersuites are registered to accommodate deployments
with regulatory or compliance mandates that require the exclusive use
of post-quantum algorithms, such as those governed by the Commercial
National Security Algorithm Suite 2.0 [CNSA2.0], as well as
deployments where the size or performance overhead of a traditional
component is undesirable.
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When the Key Encryption algorithms defined in Table 3 or Table 4 are
used in a General JWE JSON Serialization with multiple recipients,
all recipients MUST use a quantum-resistant Key Management algorithm.
Including a recipient that uses an algorithm that is not quantum-
resistant would allow an adversary performing an HNDL attack to
recover the Content Encryption Key once a CRQC becomes available; see
Section 15.4 of [I-D.ietf-pquip-pqc-engineers].
5.1. Security Strength
Ciphersuites based on ML-KEM-768 target NIST post-quantum security
level 3; those based on ML-KEM-1024 target security level 5 (see
Section 11 of [I-D.ietf-pquip-pqc-engineers]). In the PQ/T hybrid
ciphersuites, the traditional component provides an additional
classical security floor: P-256 and X25519 offer approximately
128-bit classical security, while P-384 offers approximately 192-bit
classical security. The -KE variants share the same cryptographic
properties as their integrated encryption counterparts.
All ciphersuites use SHAKE256 as the KDF, aligning with the hash
family used internally by ML-KEM. They also use AES-256-GCM as the
AEAD. As discussed in Section 3.1 of [I-D.ietf-pquip-pqc-engineers],
symmetric primitives are only modestly affected by quantum attacks
and doubling key sizes is not strictly required; AES-256-GCM is
nonetheless selected to provide a comfortable margin consistent with
security level 5 parameter sets and with contemporary guidance such
as [CNSA2.0]. AES-256-GCM is used as the sole AEAD to minimize the
number of ciphersuites and reduce implementation complexity; its
widespread hardware acceleration and broad deployment make it a
reasonable single choice for all ciphersuites defined in this
document.
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]:
Note: The Algorithm Name numbering has intentional gaps so that a
given identifier always denotes the same HPKE KEM, KDF, and AEAD
combination regardless of whether it is used in JOSE or COSE. The
gaps correspond to algorithms registered only in COSE for COSE-
specific needs that do not apply to JOSE.
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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-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
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* Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]
6.1.4. HPKE-9-KE
* Algorithm Name: HPKE-9-KE
* Algorithm Description: Key Encryption with HPKE using
MLKEM768-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]
6.1.5. HPKE-10
* Algorithm Name: HPKE-10
* 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]
6.1.6. HPKE-10-KE
* Algorithm Name: HPKE-10-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
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* Specification Document(s): Table 3 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 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]
6.1.8. HPKE-12-KE
* Algorithm Name: HPKE-12-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]
6.1.9. HPKE-13
* Algorithm Name: HPKE-13
* 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
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* Change Controller: IETF
* Specification Document(s): Table 2 of this document
* Algorithm Analysis Document(s): [I-D.ietf-hpke-pq]
6.1.10. HPKE-13-KE
* Algorithm Name: HPKE-13-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]
7. References
7.1. Normative References
[I-D.ietf-hpke-hpke]
Barnes, R., Bhargavan, K., Lipp, B., and C. A. Wood,
"Hybrid Public Key Encryption", Work in Progress,
Internet-Draft, draft-ietf-hpke-hpke-03, 2 March 2026,
<https://datatracker.ietf.org/doc/html/draft-ietf-hpke-
hpke-03>.
[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, 2 March
2026, <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-18, 24 May
2026, <https://datatracker.ietf.org/doc/html/draft-ietf-
jose-hpke-encrypt-18>.
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[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/rfc/rfc2119>.
[RFC4648] Josefsson, S., "The Base16, Base32, and Base64 Data
Encodings", RFC 4648, DOI 10.17487/RFC4648, October 2006,
<https://www.rfc-editor.org/rfc/rfc4648>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/rfc/rfc8174>.
[RFC9964] Prorock, M. and O. Steele, "ML-DSA for JSON Object Signing
and Encryption (JOSE) and CBOR Object Signing and
Encryption (COSE)", RFC 9964, DOI 10.17487/RFC9964, May
2026, <https://www.rfc-editor.org/rfc/rfc9964>.
7.2. Informative References
[CNSA2.0] National Security Agency, "Announcing the Commercial
National Security Algorithm Suite 2.0", May 2025,
<https://media.defense.gov/2025/May/30/2003728741/-1/-1/0/
CSA_CNSA_2.0_ALGORITHMS.PDF>.
[I-D.ietf-pquip-pqc-engineers]
Banerjee, A., Reddy.K, T., Schoinianakis, D., Hollebeek,
T., and M. Ounsworth, "Post-Quantum Cryptography for
Engineers", Work in Progress, Internet-Draft, draft-ietf-
pquip-pqc-engineers-14, 25 August 2025,
<https://datatracker.ietf.org/doc/html/draft-ietf-pquip-
pqc-engineers-14>.
[RFC7518] Jones, M., "JSON Web Algorithms (JWA)", RFC 7518,
DOI 10.17487/RFC7518, May 2015,
<https://www.rfc-editor.org/rfc/rfc7518>.
[RFC8792] Watsen, K., Auerswald, E., Farrel, A., and Q. Wu,
"Handling Long Lines in Content of Internet-Drafts and
RFCs", RFC 8792, DOI 10.17487/RFC8792, June 2020,
<https://www.rfc-editor.org/rfc/rfc8792>.
[RFC9794] Driscoll, F., Parsons, M., and B. Hale, "Terminology for
Post-Quantum Traditional Hybrid Schemes", RFC 9794,
DOI 10.17487/RFC9794, June 2025,
<https://www.rfc-editor.org/rfc/rfc9794>.
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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. Long lines in the
examples are folded using the single backslash strategy from
[RFC8792]. Before using a folded example as a test vector, remove
the RFC 8792 header and unfold the lines according to that strategy.
The complete unfolded vector set is available as examples/jose-
vectors.json in the repository (https://github.com/panva/draft-jose-
hpke-pq-pqt) for this document.
A.1. HPKE-8
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NOTE: '\' line wrapping per RFC 8792
{
"kty": "AKP",
"alg": "HPKE-8",
"kid": "DmOWQi-VwrjZWjO6mQQWdv3CJ_v9k_PH3vS7S0xoah8",
"pub": "6XRnIatC1KtI7DZlj8ISDxZvtsFeBOPKQETMRRYb45dR0kw6TDSb8UMXHH\
WhUBdbEBof5gvIJacZG4exGku4JsysQcc9AVR6Ydih7kaPNQgCiiKw9QACNCMWx2\
p171RVCpGSFoOwaejNGZeNJKS4jqulOWFQHGtbWhl64HZzlkZMxhqdA-EecEOLhz\
CkbCMMtXxb-cxUVkOxQpKkO5ofmEaKH7tjyNZyVsxqgUZFn6K8jOq9g6GCOEG4aw\
GB6AZC72yNXLDBnVCy_7OMn2bAeos8AvhHkbsL0hsFFjsnWcG_IYvNPzUAcyGZlp\
sqjXJIh4AUxTi6iFeJFOE08nNM3KQEYlxkMAulVas2E4KU_TGeoEJeZjA5TPWVAQ\
iPFFQ4nNRh1kotf4OHtHQVpaMzAypItIXAU8LI_gl4rdFKTfYu18MKnygjEnO9Z7\
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ADvNmtNyQgjRFKhmNPtYchXHWz_tgccWNkm1DD6qMATOoZcscAu8BBpKUwUIkIUI\
CwKpay5KUsFjKpC9HPqSONVMVu7GYysVC8UDTMetWoXlSiDetoiolwFGGpIscf1i\
c_rUhbD3pyxVI8DqCsdFg2NcSvIJRoJBO12KHKRIYnc8ObgCzJBULNZ1Rmc5tCbm\
cW_mmhg0OiA7EJjwi_eoY82_g0eiyAr0K4DmBy8yqWDZV45KfAnYQBQZvK8zlj0n\
pGqVWusxzP1mw_Dbhnp-Z6SyIrHNI9unG7DbeDhcnBD2QBp2t6cNgvUoCLzPReQP\
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C-Fqjwfg_xYMk3oOcZQ-P5NrsNxK3ho7xmtpSKVahpf_2P_o2Vz8YFc7t2S7jAx9\
bRLQQpbA",
"priv": "c1il1CJwUdajeAm8PMZMq4mw2PH9Z2vThLkHU2MQ10A"
}
Figure 1: HPKE-8 Private JWK
Skokan, et al. Expires 10 December 2026 [Page 14]
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NOTE: '\' line wrapping per RFC 8792
{
"protected": "eyJhbGciOiJIUEtFLTgiLCJraWQiOiJEbU9XUWktVndyalpXak82\
bVFRV2R2M0NKX3Y5a19QSDN2UzdTMHhvYWg4In0",
"aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
"encrypted_key": "zRayDf-tglGK_UsfOjbbVDf_GPQKpRLNx-pusFTw6REZlhoX\
c8INMxK5ETEdsx-0MTVa_8AIou9zUiaHPw-Iv1nk7X0rdIFYjKOTnjRUy_DuRIRa\
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SeghLYy3c8XF80XxStZX5OAQV36AavxZrGyX3gMS024KX-wbNytokZbocP4EOLum\
sml35g9ePuXmJjEweCm-D5fqMe_uaLaRP9RveNyNsCd3arMLkn5PSpRTuTsMOhLm\
45olI85aNT9TrL1oMw",
"ciphertext": "Kqt2-MjNX9R4OmghbRcEPdzNJvCyvAUbezJcRvKnbzWqu3JsfGk\
O54gurgSvQcQhAnTWLfJbDJvFJWzqCkXoqgYtgsvrnxFNqJ_j7194RxeH39eXb0M\
oVkTgPRQO1gmbtr9VPTrkPXlGCWZjrdVGEUZ5qJZvZfHIYyo2_egOP5CuMzbZuNQ\
tjxeTdagfBqAymYpk5O8VqubF160UrVDZnDfm3ndEGH4oFZwPVtPH2IaYcubiTm1\
00oxPdTTKZX1PeieRG5RodWY6rMsrA0_dMbXrTDg3spqXloEySB5i9w9ChHZ4s1U\
HzihtusJvw4qI1kQSZZc6RxELIzED3s5OHhpuzKTrl-3vVwlf9Ily74215pZwdJW\
7CVWTL-Xe9fhxEA"
}
Figure 2: HPKE-8 Flattened JWE JSON Serialization
Skokan, et al. Expires 10 December 2026 [Page 15]
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NOTE: '\' line wrapping per RFC 8792
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GcCGCvB-tYqSu2ULUIgBXLlM2O8OZXIMHx28m_f--dNZH7YVdxZbIe69RLkYCxoZlolh\
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R-hgYR2K9YVlKmRGewZ-juYE1zpxKk-X7iAPS0q-DTXIyqsr_4gXulomCy1pzHCdwkc4\
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P8Orm57_BaxGEjwmlsggLAxXrsx7Seg5qRe_YjKCQcHjtjOtgXsp485CemZjz08CzElo\
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2JEGwpxC78EQYNKU9ZdggpnHgpE6aSgBtB-P4Tr5p8gMhF8E53UVNHRPXWOjfChtA-CV\
pi8p6qE5_a4MPedjf0GkcutKIQ9WNL2zhrYo7DvlylBcX0YQUcqltcKSS6jaS9FeNQ..\
k8no633YrPgoESVevhyqn8Q0lihzU9hyVR-uzYzPDXwxLcxEK0pt-if1bKq8IoJyZWB8\
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nrQgTiQ5sjDgc_Is9ZhZ4NOYpVo5sEcbbx-uJu-0u9cXgoEAXk68BlBQ6YCDQwoRgJzC\
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PrgS_jDvArJHRtFhC7c9ax8btYkcrbmRfWG5UxVOjue_BOh-xvkpWQnJXjHOJbPMAgCa\
ZCQ3kVbG_zfhtID1nlQWnFZQA3jG16jAtIGMLb8Qgjn-cw.
Figure 3: HPKE-8 JWE Compact Serialization
A.2. HPKE-8-KE
Skokan, et al. Expires 10 December 2026 [Page 16]
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NOTE: '\' line wrapping per RFC 8792
{
"kty": "AKP",
"alg": "HPKE-8-KE",
"kid": "clBPky-tElQGRa8AQ1MYfMPvfqmhOs_5lIejOuqAdps",
"pub": "pxQRXrRJLke8BMBXa1FT74gM9fq71fEwRPRndVsmsYAMU6llEnJaeKAagj\
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xGbyArJA",
"priv": "biUK5NqJzXzWEAN0F2zzkrEr9Rp_QX55is_j7VYuHCQ"
}
Figure 4: HPKE-8-KE Private JWK
NOTE: '\' line wrapping per RFC 8792
{
"protected": "eyJhbGciOiJIUEtFLTgtS0UiLCJraWQiOiJjbEJQa3ktdEVsUUdS\
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Q3QzbnVYdEdXeTRxMTBSSWlRcDRWdUdGdWpRNk02UUptby1NVVRJdDdzOGtGWWN0\
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"aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
"iv": "GRZLhvvj7vBw-FZm",
"ciphertext": "D5bqaQekeFnn_YlzsERq8jp5w6Y0t2gulaz_ql9AIqozptDIHEA\
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"tag": "8A439opYUyFbYJdDno_Bfw",
"encrypted_key": "K4m6zdOhTuo7VRZuZOmmypBM_WxLAI16vZklK3EnnrPLTyXK\
rUqySJOIn6TPhnn_"
}
Figure 5: HPKE-8-KE Flattened JWE JSON Serialization
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KxqGMUyhx2zGW20K0ocJQ4wYB-mNquVzJt05wWlDn.I8b81u8JDAfDrZLQrLpe1w
Figure 6: HPKE-8-KE JWE Compact Serialization
A.3. HPKE-9
Skokan, et al. Expires 10 December 2026 [Page 19]
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{
"kty": "AKP",
"alg": "HPKE-9",
"kid": "BeWp7Y5tolX2sSYMKIaG6WUVE-arTKcS2Ok8EgqFqrE",
"pub": "ZEbKruTLTRJZf-UygOWQwuBNzChq8yuhGTVITLeU7emGD9tF9oFEy1BP9h\
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"priv": "tQDSUt-Mgd0LNFiUK9VEluJnrtg057pCq97A54EdbiM"
}
Figure 7: HPKE-9 Private JWK
Skokan, et al. Expires 10 December 2026 [Page 20]
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{
"protected": "eyJhbGciOiJIUEtFLTkiLCJraWQiOiJCZVdwN1k1dG9sWDJzU1lN\
S0lhRzZXVVZFLWFyVEtjUzJPazhFZ3FGcXJFIn0",
"aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
"encrypted_key": "FNPUnD-x_KD2ZlRpfS1i5otH3zXS0p5YqAX1IQXDg7KkVDfP\
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RNKwc7ffpbhl-ztL-H54o9-NIoveutL8V957RA",
"ciphertext": "V4iZyqGIdT83y_Eb6dE2c5l0-LMzKAXVnJwmXt9337d9haaaHlG\
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TzTblfqELzPe0VA"
}
Figure 8: HPKE-9 Flattened JWE JSON Serialization
Skokan, et al. Expires 10 December 2026 [Page 21]
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GA.
Figure 9: HPKE-9 JWE Compact Serialization
A.4. HPKE-9-KE
Skokan, et al. Expires 10 December 2026 [Page 22]
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NOTE: '\' line wrapping per RFC 8792
{
"kty": "AKP",
"alg": "HPKE-9-KE",
"kid": "I8THo1KoAq9OG96cJTyk2WF8abZqb3kKKHgdfajHUb8",
"pub": "8rGsDcYDVYgHXJdoG_y4snlf_zZ2J7IJ_dyGafoU-8PBqdSb4dKAAggLvU\
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"priv": "q_aDEMZpRAjbiqHwO23vKcgImYieSqUsCK7wWZEsq8Y"
}
Figure 10: HPKE-9-KE Private JWK
NOTE: '\' line wrapping per RFC 8792
{
"protected": "eyJhbGciOiJIUEtFLTktS0UiLCJraWQiOiJJOFRIbzFLb0FxOU9H\
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"aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
"iv": "d8CFuwBEVbiI_nK7",
"ciphertext": "kmsiEt2hnihtuOyfGiFAs26cHoVya0vXhz62N6vmF4NnZP879ES\
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"tag": "l7BtLt_8bQpsUK0NS-G5Gg",
"encrypted_key": "hEaoX4fNiWQ-xb_y31sERZsttys1fGKexhdYll0PkJDtNclb\
-M9rmeB7xQypVLaM"
}
Figure 11: HPKE-9-KE Flattened JWE JSON Serialization
Skokan, et al. Expires 10 December 2026 [Page 24]
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NOTE: '\' line wrapping per RFC 8792
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cxoxA
Figure 12: HPKE-9-KE JWE Compact Serialization
A.5. HPKE-10
Skokan, et al. Expires 10 December 2026 [Page 25]
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NOTE: '\' line wrapping per RFC 8792
{
"kty": "AKP",
"alg": "HPKE-10",
"kid": "EkIcXLM8dkXQX6mzrxYWNBY8lndA5H3H-v8TfiSDLfI",
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"priv": "Ru9DwxiJ7BdWBh82FsXaAPPR4s5MZoadKL9y2wGmino"
}
Figure 13: HPKE-10 Private JWK
Skokan, et al. Expires 10 December 2026 [Page 26]
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NOTE: '\' line wrapping per RFC 8792
{
"protected": "eyJhbGciOiJIUEtFLTEwIiwia2lkIjoiRWtJY1hMTThka1hRWDZt\
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"aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
"encrypted_key": "PqSkdKSW75FL3sRXdax8xJP8rcRgzVg3pvPe5diLa2U7Zq5r\
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YKc7deIHGfrpu9fQCy0l9En-bLXwCAFklKXjeVmmvEilbaucHuvznrgZYexz",
"ciphertext": "9kfFny-tTRwymjXj75P84eWObnYaSy3BpPcM4Duh-TMYi2ZjKUD\
ogtdcCwN92Whe-O8RCBcEy31EMcair8LuViyVmB1MTe2EmjZAf-jAxy4VY5nKU41\
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H6swyz-NdheA9cvVQWcV-cOaoh0gfED9mekWhF3iLKVfTeJjs7R_ZbcmKnfx-rwc\
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3VoJyAM55LF-sb83nH_ShtyiQCVl5r66uZCXkbMMVgySw1EBsfmLJUZzuiZtr9U8\
ipA94iU9xM9zIPw"
Skokan, et al. Expires 10 December 2026 [Page 27]
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}
Figure 14: HPKE-10 Flattened JWE JSON Serialization
NOTE: '\' line wrapping per RFC 8792
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oR_P4MfIEGjRe8Y1KihkjLppWehZwoyD2UVzv2wi-sUTDcaRCM2tJn28asl8EyRW34Fv\
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XpVdJwQum76o8vLSE624ATEAz3aS-VXauyx1Fsn1wKhw5Yz9nIp9EHtpR6gE3-osNLIa\
i6fPzyoT9V05CDFaIuOvLXWRrggM3vYWicbdInOMCnCdTCj04WVt2yzwnm-ZJw3NkMeq\
9uV8XCyXrbPyGWgLdAgUW7v9TcFQWUAEh6dGs2JbgUJgC0qFopRJBtwwJJ2fGOnwyZ84\
gpQK-zBqnKp_kn-6jyjl9fPRfh2jPoK61Sy7gTDXV5Ceq55Nw.
Figure 15: HPKE-10 JWE Compact Serialization
Skokan, et al. Expires 10 December 2026 [Page 28]
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A.6. HPKE-10-KE
NOTE: '\' line wrapping per RFC 8792
{
"kty": "AKP",
"alg": "HPKE-10-KE",
"kid": "UVzPOxx3jthVCg56hBO353HIP_hObFaFrI-pf3maRr4",
"pub": "9ALOt9bAhXcL6nyuwPy-cqzMgPbADhIWe-g3IFA6fFUeidZ_SDun5zbISB\
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"priv": "uSDPZnwwnLpJ18lwAGHj75e-fGohW7zOWhAG-7DGLis"
}
Figure 16: HPKE-10-KE Private JWK
Skokan, et al. Expires 10 December 2026 [Page 29]
Internet-Draft JOSE HPKE PQ June 2026
NOTE: '\' line wrapping per RFC 8792
{
"protected": "eyJhbGciOiJIUEtFLTEwLUtFIiwia2lkIjoiVVZ6UE94eDNqdGhW\
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WE1ieTRSSFFTbVpxSFBqV1ZERWQxaTBHWjJZV0EzaWlYY0U2a3FTUGRmWE5BVF9S\
UEpocFRjUTJrbWFrOTV4NVMtMVdvSjJXQ0NWdWEyODVnNFZaQ0x2Wmd1QjNESzJR\
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OTJjeE5FZXRhYmJNZFlYQ2tEcyJ9",
"aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
"iv": "QhIHZiO-gUr7ZkJU",
"ciphertext": "9ct3eSqXU0voatHvMht3bpOxfTEsFNcxgPHqJykMbQYsRzdgD5w\
N4KpdUZ8OzxwI65OB6ifP3ekDEwqOybu8W8jlPlW-5O_Rpn7anpoYDKDw_Na6_gE\
IsdJi89L_9N_3gh8v4dM8n4feY_jVmuWf2JLNrLuIaghtginwHzVeSctFF_anTP6\
toPOAql9Nm2v4UYJlNoi56oN4jZKYSZoQq8l4Bhiw2I7IlU33_bhUOu7U8AcaEJ3\
bemHgGY9grjv9E7zVk6VSsWx2kdmCMHc7uPHoT0akt-pzUBmbmJXq86z5BrWdfwP\
i-Z1IZ_h86rShfB3hF8FKjCQrpQCCiAO3gWO6UBa_Uyse4ma0K5uqBQol",
"tag": "H9VOy57gURPVe2hxW6pq0Q",
"encrypted_key": "FF9SOzjoJxyoocqLxl7zsPeX7982LMT7kDpWdliwzPAQh4sW\
KE_8VGvncRwTGS41"
}
Figure 17: HPKE-10-KE Flattened JWE JSON Serialization
NOTE: '\' line wrapping per RFC 8792
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ZXV1oGmydREjiXVQtEpUFg
Figure 18: HPKE-10-KE JWE Compact Serialization
A.7. HPKE-12
Skokan, et al. Expires 10 December 2026 [Page 32]
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NOTE: '\' line wrapping per RFC 8792
{
"kty": "AKP",
"alg": "HPKE-12",
"kid": "jw8GWrYDUzjH0aZRXlCtcokQwI4elPLJKKulziQwsB4",
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"priv": "oNrZa1bdAQtxbp26w5mcZgzw7fKR0WxEbpRhVH5tcPRQxzIk3Iiqt6p9F\
n88pjYoaUmmlaNymuTk_ws1WgWd2g"
}
Figure 19: HPKE-12 Private JWK
Skokan, et al. Expires 10 December 2026 [Page 33]
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NOTE: '\' line wrapping per RFC 8792
{
"protected": "eyJhbGciOiJIUEtFLTEyIiwia2lkIjoianc4R1dyWURVempIMGFa\
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"aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
"encrypted_key": "sq1TmK2Oa6_P7yp6eYYDAzYv1biKXQ9fO2zORNkdFAFOnTZT\
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"ciphertext": "opqe-7Y8RSKoR6OAbqm0n0GuRQa0oLttHqH6RXRDR2dqgnn1P9a\
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DBwXQUG7BhMTnrA"
}
Figure 20: HPKE-12 Flattened JWE JSON Serialization
Skokan, et al. Expires 10 December 2026 [Page 34]
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NOTE: '\' line wrapping per RFC 8792
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wjUHzCg9q5kz4MuDWizCy3NE-UCw.
Figure 21: HPKE-12 JWE Compact Serialization
A.8. HPKE-12-KE
Skokan, et al. Expires 10 December 2026 [Page 35]
Internet-Draft JOSE HPKE PQ June 2026
NOTE: '\' line wrapping per RFC 8792
{
"kty": "AKP",
"alg": "HPKE-12-KE",
"kid": "ogbSkvF4f3pRb1dWsBe1HpdXtfiRwZsYrhaxzxlWv_Q",
"pub": "HzogrJREUPAOuEVqa-DP_tVzOjIvQ3PBDwozMZK-LnQht_mjYEphugmVjF\
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"priv": "r5W6TvhlPnuzH-g2OggdYADlRWW7ccGhUd2MADCdAFxZ1oCX1YANTcjXv\
EVSjYQ6cLYhHgkYPmCqLJkv9JuGlQ"
}
Figure 22: HPKE-12-KE Private JWK
NOTE: '\' line wrapping per RFC 8792
{
"protected": "eyJhbGciOiJIUEtFLTEyLUtFIiwia2lkIjoib2diU2t2RjRmM3BS\
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"aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
"iv": "0nl1mu3QLNZhTMZ2",
"ciphertext": "GMIQ0AeAXSYshWUO2mK14kgZpaEVNX9iR4-khwuZIdjvZuHLIaV\
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"tag": "6eK5vdz8D1Klac80UZ61Dg",
"encrypted_key": "BvAkmT0cnwAim8X6efNitQN2OKhZ4UWlAzI8rpQfglu6Tvc0\
XEdVHJQFAy4mEbHo"
}
Figure 23: HPKE-12-KE Flattened JWE JSON Serialization
Skokan, et al. Expires 10 December 2026 [Page 37]
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NOTE: '\' line wrapping per RFC 8792
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iJkAkjMsXYOMlcrsA
Figure 24: HPKE-12-KE JWE Compact Serialization
A.9. HPKE-13
Skokan, et al. Expires 10 December 2026 [Page 38]
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NOTE: '\' line wrapping per RFC 8792
{
"kty": "AKP",
"alg": "HPKE-13",
"kid": "wIKmf5ISyZZlOkqqjwW707KCxkqEc4cJg7fYFLBkr5o",
"pub": "59oD4empWTtMhOR7pGVyBEKEb5lttgUhITCq85eyJGpyZXa56wd-HfoHj9\
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}
Figure 25: HPKE-13 Private JWK
Skokan, et al. Expires 10 December 2026 [Page 39]
Internet-Draft JOSE HPKE PQ June 2026
NOTE: '\' line wrapping per RFC 8792
{
"protected": "eyJhbGciOiJIUEtFLTEzIiwia2lkIjoid0lLbWY1SVN5WlpsT2tx\
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"aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
"encrypted_key": "A7QASMGmBzxW6c03sNy4wWpCV2IpNMWZpGMzU6potmBO-Veh\
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9uh0m4Nqc7PB8OgYS8rNv9guGy30cjj-UtrhqksXCyr2rweMW6md7rLgbY8",
"ciphertext": "09RTEoHUgifJuBgWnroH3CcK_8dPA10jT6NxNV9hN8TDF0007Bv\
HRzKCj0uKVqXka9e_4dN36g9mrdDTvaIkZKaWdFbLTz2xNjdYgEAM1FsJ-XBx3Kf\
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MGSEgVOjcDF9Pfjh8BEfv_1GpDQyM3HLNWDQgJY19CmibuAL9F-Dz_OxETiHm8eb\
rZwSKBudmd0vlEg"
}
Skokan, et al. Expires 10 December 2026 [Page 40]
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Figure 26: HPKE-13 Flattened JWE JSON Serialization
NOTE: '\' line wrapping per RFC 8792
eyJhbGciOiJIUEtFLTEzIiwia2lkIjoid0lLbWY1SVN5WlpsT2txcWp3VzcwN0tDeGtx\
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ifVHYdtRRroREhIWZRdfFk1BLSboPBi32JYjUwBa8oGoMPaWKgqRlIuoYRFy06Kgxq2p\
qiLYMZdU..yvdUQEJ6vubOBf7_3ZTn-_jn-11RxwmNp3mGRlolntghI5Sh1EJjnhRBsO\
KhP5AoRdCesJhI--Cpj16sCWdF6_wBTFl9HLRJ5OrIK7u7ew63eGBF6e3RMvYya15pff\
CgL0LNDMr4wRJW85_ys-k-xSgCI75IiEMdUd1VubrN-xmbGvoSoENhHdmHvdV-Geq4le\
qPnlx_9yPe4tOZM-QR8zRFrJPXhXDY-pPHVk0ZUk38J7UZ_1WSsyGEL3Y8lsFM9RyjBy\
MRG5NOBPy5-yfecIHidLgoUH57JqSQRMu1Us_cyvriYFMg9L6gAVpScrJsLrvlyLcqEG\
t4GQhPuYJ-1ObQRA1sZO7kDZSL-jOtaYVtkx9WXGyM0Qp5JprkIY_hhw.
Figure 27: HPKE-13 JWE Compact Serialization
A.10. HPKE-13-KE
Skokan, et al. Expires 10 December 2026 [Page 41]
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NOTE: '\' line wrapping per RFC 8792
{
"kty": "AKP",
"alg": "HPKE-13-KE",
"kid": "OJo7M3Ej3shaFw4VdozYxtqoGXsMA9TDkwy4Pvn0BCo",
"pub": "h3uSp1uJz_gkIKvKFSE-v6IM7SQ3hRZpDpxr-3Wym8lDvzRM6yUrOOzPQK\
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JqezqBlWV6yvGGWkGqWquq7HwyPY-uATVbu8mdKz_H2sgmYdQ",
"priv": "TK5a5VLDLOMcxsYNS49vGjawNMMl0Bbm846PPVwPAKMvawmQFwwVBD-Ot\
hN-LrGWW6f-d2jz_RlIcnSPhckg5A"
}
Figure 28: HPKE-13-KE Private JWK
Skokan, et al. Expires 10 December 2026 [Page 42]
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NOTE: '\' line wrapping per RFC 8792
{
"protected": "eyJhbGciOiJIUEtFLTEzLUtFIiwia2lkIjoiT0pvN00zRWozc2hh\
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c1BEWFRCbnJsbFZhQ2tGVDhScW9hb2lDS09VUWM3czhfS1ppcmxGZkNyZlNLTVhh\
VFk1c056RmxXT0hyWmlMMjlYZHJrZHl0WVc3ZExLWHZKUnNtMnJfMFB6OEZpc09k\
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M1p5Yi1xeUNlUUlqZVNMcWlXQnFhNXRyNU82cGlwQWlZWU5GMHRIaVlCVHNkbDlv\
dmJtdnZSRTd2S0VkMU9XUkstV2VvNFhHOVpJN0w3bml3TUk1eG5CYlJzM1NSUXlZ\
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MjNfZ2pzcjI3WWRKeE1lUWFlQThNVEZadW80Nnd0ZFhVelJ2ME0yV25yaUN2bTlB\
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OFM0UG0walZyalV1cVJ0SjRLNHhMbk1GUTNkSWdIbEFqdyJ9",
"aad": "VGhlIEZlbGxvd3NoaXAgb2YgdGhlIFJpbmc",
"iv": "4kbBObrz8_rXvess",
"ciphertext": "rp61DElcDQKgF_QsxMP2YsdsXLUdFiBVV-FcfEg7rf5Dgny1s5Y\
nTDs7d9Y_TPwWXEIhIUmPrsSlSd2VJPEmzW76oY663xchZ4VfXyQGHV3wmBWAIpN\
m1rm0cIUgFJMUIkGsgGiFCs2mLhzQKpASFzzA7Iwu9jxnryhw01dMc9xbOYJ_fNr\
MWQI5aepqyQKQcfCkSU8f_FSvp9NQypbd1jOf773NFk-vurwu9mg-I0P0UnIWcRW\
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EqG4U5RBUY6fbNUiPc5FQCNNseTRUCWZNLFoLKQdHL4rd1IVK3MXMXuD0",
"tag": "857uXyIeZ-VhuBmOFb6Y3g",
"encrypted_key": "P0RlHe_TVfzgUj-hqTTlUXJgMpX8IJ6VY9sM_IWoAj9D7mEV\
C6Hrha2xnIeUOp71"
}
Figure 29: HPKE-13-KE Flattened JWE JSON Serialization
NOTE: '\' line wrapping per RFC 8792
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Figure 30: HPKE-13-KE JWE Compact Serialization
Acknowledgments
TODO acknowledge.
Document History
draft-ietf-jose-hpke-pq-pqt-00
* Initial WG draft following adoption confirmation
draft-skokan-jose-hpke-pq-pqt-05
* Folded long test-vector lines using the RFC 8792 single backslash
strategy and added a pointer to the unfolded vector set in the
repository
draft-skokan-jose-hpke-pq-pqt-04
* Removed ChaCha20Poly1305 AEAD ciphersuites
* Renumbered algorithms with intentional gaps to align identifiers
with COSE; added an explanatory note in IANA Considerations
* Added a Security Strength subsection and HNDL/multi-recipient
guidance to Security Considerations
Skokan, et al. Expires 10 December 2026 [Page 45]
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* Added rationale for selecting AES-256-GCM as the sole AEAD
* Refactored the JSON Web Key Representation section
* Added informative references to I-D.ietf-pquip-pqc-engineers, RFC
9794, and CNSA 2.0
* Adopted RFC 9794 terminology in Conventions and Definitions
* Added rationale for registering both PQ/T hybrid and pure PQ
ciphersuites in Security Considerations
* Added Hannes Tschofenig and Tirumaleswar Reddy as authors
draft-skokan-jose-hpke-pq-pqt-03
* Clarified "hybrid" terminology disambiguation in the Introduction
* Added descriptive text to Key Encryption algorithm sections
* Expanded Security Considerations with ML-KEM-512 omission
rationale
draft-skokan-jose-hpke-pq-pqt-02
* Added Test Vectors appendix
draft-skokan-jose-hpke-pq-pqt-01
* Added example JWK representations
draft-skokan-jose-hpke-pq-pqt-00
* Initial draft
Authors' Addresses
Filip Skokan
Okta
Email: panva.ip@gmail.com
Brian Campbell
Ping Identity
Email: bcampbell@pingidentity.com
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Hannes Tschofenig
University of the Bundeswehr Munich
Email: hannes.tschofenig@gmx.net
Tirumaleswar Reddy
Nokia
Email: k.tirumaleswar_reddy@nokia.com
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