RFC 9734: X.509 Certificate Extended Key Usage (EKU) for Instant Messaging URIs

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

RFC 5280 specifies several extended key purpose identifiers (KeyPurposeIds) for X.509 certificates. This document defines an Instant Messaging (IM) identity KeyPurposeId for inclusion in the Extended Key Usage (EKU) extension of X.509 v3 public key certificates

Document record

Document ID

RFC9734

Published

February 2025

Authors

R. Mahy

Status

PROPOSED STANDARD

Stream

IETF

Area

sec

Pages

5

Also known as

—

• Read the full RFC text →
• Plain text version
• IETF Datatracker history
• DOI: 10.17487/RFC9734

Topics

• x.509
• certificate
• extended key usage
• eku
• instant messaging
• im URI
• mimi URL

Related documents

Ranked automatically by shared keywords, IETF area and stream — not by editorial selection.

• RFC 9763Related Certificates for Use in Multiple Authentications within a ProtocolCurrent

  June 2025

• RFC 9802Use of the HSS and XMSS Hash-Based Signature Algorithms in Internet X.509 Public Key InfrastructureCurrent

  June 2025

• RFC 9881Internet X.509 Public Key Infrastructure -- Algorithm Identifiers for the Module-Lattice-Based Digital Signature Algorithm (ML-DSA)Current

  October 2025

• RFC 9935Internet X.509 Public Key Infrastructure - Algorithm Identifiers for the Module-Lattice-Based Key-Encapsulation Mechanism (ML-KEM)Current

  March 2026

• RFC 8555Automatic Certificate Management Environment (ACME)Current

  March 2019

• RFC 5750Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Certificate HandlingObsoleted

  January 2010

• RFC 4490Using the GOST 28147-89, GOST R 34.11-94, GOST R 34.10-94, and GOST R 34.10-2001 Algorithms with Cryptographic Message Syntax (CMS)Current

  May 2006

• RFC 3850Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Certificate HandlingObsoleted

  July 2004

Also filed under

• PROPOSED STANDARD
• 2025
• IETF stream
• sec area