CA/Browser Forum

S/MIME Baseline Requirements (S/MIME BR)

Baseline Requirements for the Issuance and Management of Publicly-Trusted S/MIME Certificates

Draft Version (undergoing IPR Review)

NA

Current Version

S/MIME Baseline Requirements v. 1.0.11 (redline) - adopted by Ballot SMC013

Previous Versions

S/MIME Baseline Requirements v. 1.0.10 (redlined) – adopted by Ballot SMC012

S/MIME Baseline Requirements v. 1.0.9 (redlined) – adopted by Ballot SMC011

S/MIME Baseline Requirements v. 1.0.8 (redlined) – adopted by Ballot SMC010

S/MIME Baseline Requirements v. 1.0.7 (redlined) – adopted by Ballot SMC09

S/MIME Baseline Requirements v. 1.0.6 – adopted by Ballot SMC08

S/MIME Baseline Requirements v. 1.0.5 – adopted by Ballot SMC07

S/MIME Baseline Requirements v. 1.0.4 – adopted by Ballot SMC06

S/MIME Baseline Requirements v. 1.0.3 – adopted by Ballot SMC05

S/MIME Baseline Requirements v. 1.0.2 – adopted by Ballot SMC04

S/MIME Baseline Requirements v. 1.0.1 – adopted by Ballot SMC03

S/MIME Baseline Requirements v1.0.0 – adopted by Ballot SMC01

Latest releases
Server Certificate Requirements
SC-089: Mass Revocation Planning - Aug 26, 2025

Code Signing Requirements
v3.8 - Aug 5, 2024

What’s Changed CSC-25: Import EV Guidelines to CS Baseline Requirements by @dzacharo in https://github.com/cabforum/code-signing/pull/38 Full Changelog: https://github.com/cabforum/code-signing/compare/v3.7...v3.8

S/MIME Requirements
v1.0.11 - Ballot SMC013 - Aug 22, 2025

This ballot introduces specifications for the use of two post-quantum cryptography (PQC) algorithms, as standardized by the U.S. National Institute of Standards and Technology (NIST), in the S/MIME BR.

Network and Certificate System Security Requirements
Version 2.0.5 (Ballot NS-008) - Jul 9, 2025

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The Certification Authority Browser Forum (CA/Browser Forum) is a voluntary gathering of Certificate Issuers and suppliers of Internet browser software and other applications that use certificates (Certificate Consumers).