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2023-06-29 Minutes of the Code Signing Certificate Working Group

Attendees

Andrea Holland (VikingCloud), Atsushi INABA (GlobalSign), Ben Dewberry (Keyfactor), Bhat Abhishek (eMudhra), Brianca Martin (Amazon), Bruce Morton (Entrust), Corey Bonnell (DigiCert), Dean Coclin (DigiCert), Janet Hines (VikingCloud), Keshava N (eMudhra), Martijn Katerbarg (Sectigo), Mohit Kumar (GlobalSign), Roberto Quiñones (Intel), Scott Rea (eMudhra), Tim Crawford (BDO/WebTrust), Tim Hollebeek (DigiCert)

Minutes

**Antitrust statement: **The Antitrust statement was read.

Approval of minutes: Previous F2F meeting’s minutes still being compiled

  • Ballot: CSC 18 has passed and IPR review period is over

    • No claims received
  • Look into rebasing the last two Ballots into Dimitri’s branch

    • Now that the IPR period is over that can be done
  • Signing service Ballot

    • Most of the text is written but could now be out of Sync with updates coming in from Dimitri’s ballot
      • Need to recut the ballot after going through the previous ballot
  • High risk language change proposal (Bruce, Tim, and Ian)

    • Work on getting (High risk language, time stamping change, EB certificates, certificate transparency) discussion in a prioritized order
      • All items that have been talked about but nobody is working on a specific one
      • High risk can be done now, other two waiting on more fleshed out text
      • Certificate Transparency
      • Presentation on Certificate Transparency Coming up at an upcoming code signing meeting
    • Time Stamping change
      • Setting a requirement for time stamping, also impacts non code signing items
  • Time stamping authorities for code signing intermixed with time stamping authorities for other things and causes a number of problems but no need for it to necessarily continue
  • Potential next steps
        • Designate which timestamp servers are meant to be a codesigning according to the CAB forum code signing requirements
    • Prioritization discussions to come when Ian joins next
  • Next Call: July 13th

  • Adjourn

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).