CurrentPROPOSED STANDARDIETF stream

RFC 9810: Internet X.509 Public Key Infrastructure -- Certificate Management Protocol (CMP)

In plain English — editorial summary, not part of the RFC

This document describes the Internet X.509 Public Key Infrastructure (PKI) Certificate Management Protocol (CMP). Protocol messages are defined for X.509v3 certificate creation and management. CMP provides interactions between client systems and PKI components such as a Registration Authority (RA) and a Certification Authority (CA). This document adds support for management of certificates containing a Key Encapsulation Mechanism (KEM) public key and uses EnvelopedData instead of EncryptedValue. This document also includes the updates specified in Section 2 and Appendix A.2 of RFC 9480. This document obsoletes RFC 4210, and together with RFC 9811, it also obsoletes RFC 9480. Appendix F of this document updates Section 9 of RFC 5912.

Document record

Document ID: RFC9810
Published: July 2025
Authors: H. Brockhaus; D. von Oheimb; M. Ounsworth; J. Gray
Status: PROPOSED STANDARD
Stream: IETF
Area: sec
Pages: 116
Also known as: —

Obsoletes:: RFC 4210, RFC 9480
Updates:: RFC 5912

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Standards lineage

This document is one revision in a chain of 6 RFCs, each formally replacing the one before it.

Read the full history of Internet X.509 Public Key Infrastructure -- HTTP Transfer for the Certificate Management Protocol (CMP) →

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on 23 August 2026. RFCs are never revised after publication; changes are issued as new documents.

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