Unsigned X.509 Certificates

Metadata

Publisher: IETF
Doc Type: Standard
Pages: 10
Abstract: This document defines a placeholder X.509 signature algorithm that may be used in contexts where the consumer of the certificate is not expected to verify the signature. As part of this, it updates RFC 5280.
Publication Date: 2026-02-01
Status Note: Proposed Standard
DOI: 10.17487/RFC9925
Link: https://doi.org/10.17487/RFC9925
Author(s): David Benjamin
Keyword(s): Self-signed Certificate

Latest version of IETF RFC 9925

Document Versions — IETF RFC 9925

▶ IETF RFC 9925 (2026-02-01)

THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

IETF RFC 2119 [Active*]
IETF RFC 5280 [Active, Amended*]
IETF RFC 5912 [Active*]
IETF RFC 8126 [Active*]
IETF RFC 8174 [Active*]

Bibliographic Reference(s)

IETF.draft-ietf-jose-deprecate-none-rsa15-03 — I-D.ietf-jose-deprecate-none-rsa15 EXTERNAL
Sanderson, J., "How Many Days Has It Been Since a JWT alg:none Vulnerability?", <https://www.howmanydayssinceajwtalgnonevuln.com/>. EXTERNAL
IETF RFC 4158 [Active*]
IETF RFC 4514 [Active*]
IETF RFC 5914 [Active*]
RFC7299 — RFC7299 EXTERNAL
IETF RFC 8446 [Superseded*]
T-REC-X.509.2020 — X.509 EXTERNAL

Source Data (JSON)

Full registry record with provenance metadata. Open directly: /api/doc/RFC9925.json

Reference Tree

Explore all references and references to this document, as a navigable tree.

Open Reference Tree

Reference this Doc

Plain text (ISO 690 compliant)

Preview:

IETF RFC 9925, Unsigned X.509 Certificates. Available at https://doi.org/10.17487/RFC9925

Snippet:

IETF RFC 9925, Unsigned X.509 Certificates. Available at https://doi.org/10.17487/RFC9925

HTML (ISO 690 compliant)

Preview:

IETF RFC 9925, Unsigned X.509 Certificates. Available at https://doi.org/10.17487/RFC9925

Snippet:

<span class="citation"><cite>IETF RFC 9925</cite>, Unsigned X.509 Certificates. Available at <a href="https://doi.org/10.17487/RFC9925" target="_blank" rel="noopener">https://doi.org/10.17487/RFC9925</a></span>

SMPTE's HTML Pub

Preview:

IETF RFC 9925, Unsigned X.509 Certificates
doi: 10.17487/RFC9925
url: https://doi.org/10.17487/RFC9925

Snippet:

<li>
<cite id="bib-rfc9925">IETF RFC 9925</cite>, Unsigned X.509 Certificates
<span class="doi">10.17487/RFC9925</span>
</li>