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. 1.0.8 (redlined) – adopted by Ballot SMC010

Previous Versions

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
BRs/2.1.2 SC-080 V3: Sunset the use of WHOIS to identify Domain Contacts and relying DCV Methods - Dec 16, 2024

Ballot SC-080 V3: “Sunset the use of WHOIS to identify Domain Contact… (https://github.com/cabforum/servercert/pull/560) Ballot SC-080 V3: “Sunset the use of WHOIS to identify Domain Contacts and relying DCV Methods” (https://github.com/cabforum/servercert/pull/555)

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
v1.0.8 - Ballot SMC010 - Dec 23, 2024

This ballot adopts Multi-Perspective Issuance Corroboration (MPIC) for CAs when conducting Email Domain Control Validation (DCV) and Certification Authority Authorization (CAA) checks for S/MIME Certificates. The Ballot adopts the MPIC implementation consistent with the TLS Baseline Requirements. Acknowledging that some S/MIME CAs with no TLS operations may require additional time to deploy MPIC, the Ballot has a Compliance Date of May 15, 2025. Following that date the implementation timeline described in TLS BR section 3.2.2.9 applies. This ballot is proposed by Stephen Davidson (DigiCert) and endorsed by Ashish Dhiman (GlobalSign) and Nicolas Lidzborski (Google).

Network and Certificate System Security Requirements
v2.0 - Ballot NS-003 - Jun 26, 2024

Ballot NS-003: Restructure the NCSSRs in https://github.com/cabforum/netsec/pull/35

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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).