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About the CA/Browser Forum

The CA/Browser Forum is governed by Bylaws, which were first adopted in 2012. The Bylaws set forth the qualifications for Membership in the Forum, and the types of participation that are allowed for non-voting members, interested parties, and others.  The Forum is an unincorporated association of separate organizations.

All active participants in CA/Browser Forum activities must agree to the Forum’s Intellectual Property Rights Policy, also adopted in 2012.

The Forum elects Officers — a Chair, who serves a two-year term, and a Vice Chair. The Chair and Vice Chair manage the Meetings of the Forum and act as the Forum’s official representatives.

The Forum communicates through a variety of means, such as email lists, telephone calls, face-to-face meetings, and this web site. As stated generally in section 1 of the Forum’s Bylaws, the CA/Browser Forum advances industry best practices to improve the ways that certificates are used to the benefit of Internet users and the security of their communications.

Latest releases
Server Certificate Requirements
SC098: Process RFC 8657 CAA Parameters - Jun 16, 2026

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
v1.0.15 - Ballot SMC017v2 - Jul 30, 2026

This ballot increases the minimum RSA key size for Root and Subordinate CA certificates in the S/MIME BRs from 2048 to 4096 bits for keys created after September 15, 2026, while retaining the 2048-bit minimum for Subscriber certificates. The ballot further requires that by September 15, 2027, CAs SHALL NOT issue Subscriber certificates from any Sub-CA whose RSA key modulus is less than 3072 bits, effectively sunsetting issuance from legacy 2048-bit Sub-CAs. The ballot also includes minor typographic corrections. This ballot is proposed by Martijn Katerbarg (Sectigo) and endorsed by Ben Wilson (Mozilla) and Stephen Davidson (DigiCert)

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).