The Lightweight Online Certificate Status Protocol (OCSP) Profile for High-Volume Environments

Metadata

Publisher: IETF
Doc Type: Standard
Pages: 32
Abstract: This specification defines a profile of the Online Certificate Status Protocol (OCSP) that addresses the scalability issues inherent when using OCSP in large scale (high volume) Public Key Infrastructure (PKI) environments and/or in PKI environments that require a lightweight solution to minimize communication bandwidth and client- side processing. This specification obsoletes RFC 5019. The profile specified in RFC 5019 has been updated to allow and recommend the use of SHA-256 over SHA-1.
Publication Date: 2026-07-01
Status Note: Proposed Standard
DOI: 10.17487/RFC9919
Link: https://doi.org/10.17487/RFC9919
Author(s): Tadahiko Ito
Clint Wilson
Corey Bonnell
Sean Turner
Keyword(s): Revocation

Latest version of IETF RFC 9919

Document Versions — IETF RFC 9919

▶ IETF RFC 9919 (2026-07-01)

THIS DOC [ACTIVE] [LATEST VERSION]

Normative Reference(s)

IETF RFC 2119 [Active*]
IETF RFC 3986 [Active, Amended*]
IETF RFC 4648 [Active*]
IETF RFC 5019 [Superseded*]
IETF RFC 5280 [Active, Amended*]
IETF RFC 5754 [Active*]
IETF RFC 6960 [Active*]
IETF RFC 8174 [Active*]
IETF RFC 9110 [Active*]
IETF RFC 9111 [Active*]
IETF RFC 9846 [Active*]

Bibliographic Reference(s)

Open Mobile Alliance, "Online Certificate Status Protocol Mobile Profile", Candidate Version V1.0, 27 January 2004, <https://www.openmobilealliance.org/release/OCSP/V1_0-20040127-C/OMA-WAP-OCSP-V1_0-20040127-C.pd>. EXTERNAL
IETF RFC 3143 [Active*]
IETF RFC 3174 [Active, Amended*]
RFC9500 — RFC9500 EXTERNAL

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<span class="citation"><cite>IETF RFC 9919</cite>, The Lightweight Online Certificate Status Protocol (OCSP) Profile for High-Volume Environments. Available at <a href="https://doi.org/10.17487/RFC9919" target="_blank" rel="noopener">https://doi.org/10.17487/RFC9919</a></span>

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IETF RFC 9919, The Lightweight Online Certificate Status Protocol (OCSP) Profile for High-Volume Environments
doi: 10.17487/RFC9919
url: https://doi.org/10.17487/RFC9919

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<li>
<cite id="bib-rfc9919">IETF RFC 9919</cite>, The Lightweight Online Certificate Status Protocol (OCSP) Profile for High-Volume Environments
<span class="doi">10.17487/RFC9919</span>
</li>