Related Certificates for Use in Multiple Authentications within a Protocol

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Publisher: IETF
Doc Type: Standard
Pages: 13
Abstract: This document defines a new Certificate Signing Request (CSR) attribute, relatedCertRequest, and a new X.509 certificate extension, RelatedCertificate. The use of the relatedCertRequest attribute in a CSR and the inclusion of the RelatedCertificate extension in the resulting certificate together provide additional assurance that two certificates each belong to the same end entity. This mechanism is particularly useful in the context of non-composite hybrid authentication, which enables users to employ the same certificates in hybrid authentication as in authentication done with only traditional or post-quantum algorithms.
Publication Date: 2025-06-01
Status Note: Proposed Standard
DOI: 10.17487/RFC9763
Link: https://doi.org/10.17487/RFC9763
Author(s): Alison Becker
Rebecca Guthrie
Michael J. Jenkins
Keyword(s): Certificate Request, Hybrid, Authentication, Post-quantum Cryptography, X.509, Digital Signature

Latest version of IETF RFC 9763

Document Versions — IETF RFC 9763

▶ IETF RFC 9763 (2025-06-01)

THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

IETF RFC 2119 [Active*]
IETF RFC 2397 [Active*]
IETF RFC 5280 [Active, Amended*]
IETF RFC 5652 [Active*]
IETF RFC 6019 [Active*]
IETF RFC 8174 [Active*]

Bibliographic Reference(s)

NIST SP 800-57 Part 1 Rev. 5 [Active]
IETF RFC 5912 [Active*]
IETF RFC 6268 [Active*]
IETF RFC 8126 [Active*]
IETF RFC 8551 [Active*]

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IETF RFC 9763, Related Certificates for Use in Multiple Authentications within a Protocol. Available at https://doi.org/10.17487/RFC9763

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IETF RFC 9763, Related Certificates for Use in Multiple Authentications within a Protocol. Available at https://doi.org/10.17487/RFC9763

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IETF RFC 9763, Related Certificates for Use in Multiple Authentications within a Protocol. Available at https://doi.org/10.17487/RFC9763

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<span class="citation"><cite>IETF RFC 9763</cite>, Related Certificates for Use in Multiple Authentications within a Protocol. Available at <a href="https://doi.org/10.17487/RFC9763" target="_blank" rel="noopener">https://doi.org/10.17487/RFC9763</a></span>

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IETF RFC 9763, Related Certificates for Use in Multiple Authentications within a Protocol
doi: 10.17487/RFC9763
url: https://doi.org/10.17487/RFC9763

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<cite id="bib-rfc9763">IETF RFC 9763</cite>, Related Certificates for Use in Multiple Authentications within a Protocol
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Referenced By

IETF RFC 9794 [Active*]
IETF RFC 9958 [Active*]