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CA/B Forum Releases Code Signing Baseline Requirements – Final Draft for Public Exposure

The Code Signing Working Group of the CA/Browser Forum announces the final draft of the Code Signing Baseline Requirements. This version takes into account comments received in the first round of public review as well as comments from WebTrust auditors. Additional changes/corrections were incorporated by the working group over the past 3 months. Baseline requirements for codesigning – Feb 4 2015 This version is being sent out to the public mailing list and will be posted on the CA/B Forum website for final comments until March 6th, 2015.

Comments should be sent to: questions@cabforum.org.

If there are no further comments, the group plans to propose a ballot to the CA/B Forum in mid-March to approve the Baseline Requirements. The team wishes to thank the following companies/organizations for participating in the working group: CACert Comodo Digicert Entrust ETSI Federal PKI Firmprofessional Globalsign Intarsys Izenpe Microsoft OTA Alliance Startcom Symantec SwissSign Travelport Trend Micro WebTrust WoSign

From the beginning, we have endeavored to keep the document formation process open and inclusive and we hope everyone feels that this contribution is significant to the improvement of Internet security. Dean Coclin CA/B Forum Chair

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).