Terminology for Post-Quantum Traditional Hybrid Schemes

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Publisher: IETF
Doc Type: Informational
Pages: 15
Abstract: One aspect of the transition to post-quantum algorithms in cryptographic protocols is the development of hybrid schemes that incorporate both post-quantum and traditional asymmetric algorithms. This document defines terminology for such schemes. It is intended to be used as a reference and, hopefully, to ensure consistency and clarity across different protocols, standards, and organisations.
Publication Date: 2025-06-01
Status Note: Informational
DOI: 10.17487/RFC9794
Link: https://doi.org/10.17487/RFC9794
Author(s): Flo D
Michael P
Britta Hale
Keyword(s): Cryptography, Post-quantum Cryptography

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Bibliographic Reference(s)

10.1007-978-3-030-25510-7_12 — BINDEL EXTERNAL
ETSI.TS-103-744.2020 — ETSI_TS103774 EXTERNAL
IETF.draft-ietf-lamps-dilithium-certificates-11 — I-D.ietf-lamps-dilithium-certificates EXTERNAL
IETF.draft-ietf-lamps-pq-composite-kem-06 — I-D.ietf-lamps-pq-composite-kem EXTERNAL
IETF.draft-ietf-tls-hybrid-design-12 — I-D.ietf-tls-hybrid-design EXTERNAL
NIST.SP.800-152 — NIST_SP_800-152 EXTERNAL
Bellare, M., Desai, A., Pointcheval, D., and P. Rogaway, "Relations Among Notions of Security for Public-Key Encryption Schemes", June 2001, <https://www.cs.ucdavis.edu/~rogaway/papers/relations.pdf>. EXTERNAL
NIST, "Post-Quantum Cryptography (PQC) FAQs", 31 January 2025, <https://csrc.nist.gov/Projects/post-quantum-cryptography/faqs>. EXTERNAL
Bindel, N. and B. Hale, "A Note on Hybrid Signature Schemes", Cryptology ePrint Archive, Paper 2023/423, 23 July 2023, <https://eprint.iacr.org/2023/423.pdf>. EXTERNAL
IETF RFC 4949 [Active*]
IETF RFC 5280 [Active, Amended*]
IETF RFC 8446 [Superseded*]
IETF RFC 9180 [Active*]
IETF RFC 9370 [Active*]
IETF RFC 9763 [Active*]
ITU-T X.509 [Active]

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doi: 10.17487/RFC9794
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Referenced By

IETF RFC 9954 [Active*]
IETF RFC 9958 [Active*]