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2023-08-10 Minutes of the Code Signing Certificate Working Group

Attendees: Abhishek Bhat (eMudhra), Andrea Holland (VikingCloud), Ben Dewberry (Keyfactor), Brianca Martin (Amazon), Corey Bonnell (DigiCert), Dean Coclin (DigiCert), Ian McMillan (Microsoft), Inaba Atsushi (GlobalSign), Martijn Katerbarg (Sectigo), Mohit Kumar (GlobalSign), Rollin Yu (TrustAsia Technologies, Inc.), Scott Rea (eMudhra), Tim Hollebeek (DigiCert), Tomas Gustavsson (PrimeKey)

Note Well: The Note Well was read.

Approval of Minutes: July 27th minutes are approved.

Interested Party application: Waiting on news from Adobe regarding their application.

Ballot Status:

  • Incorporating BR references
  • Ballot has passed and is now in IPR review period.
  • Signing Service
  • Bruce is out this week as such there’s no update on this ballot.
  • Timestamping changes ballot
  • Ian and Bruce are working on this language. Language needs to be tweaked with some additional clarifications
  • Ian poses the question if we need to specify how audit criteria around key destruction should be collected. Corey mentioned he believes there’s already guidance available for auditors on the WebTrust front.

Presentation on Certificate Transparency

Tim Hollebeek ran a presentation on CT for Code Signing. Slides of this presentation are attached to these minutes.

Gather information for a Lessons Learned after hardware requirement changes

  • Ben mentioned an issue that was noticed signing Office Macros. Ian will look into it as it appears to be a Microsoft restriction

Any Other Business

Next Meeting

August 24th

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).