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2025-05-29 Minutes of the Code Signing Certificate Working Group

Certificate Signing Certificate Working Group (CSCWG) – Meeting Minutes

Date: May 29, 2025

1. Antitrust Reminder

Martijn read the Note Well

2. Review of Agenda

  • No changes proposed.
  • No meeting minutes to approve today (pending from previous meeting).

3. Discussion Topics

Face-to-Face Agenda (June 12)

  • Participants are encouraged to bring forward topics.
  • Martijn proposed a focus on the long-standing “single profile” topic.
    • Nate agreed it’s a good focus.
    • Karina will be attending and leading.
    • Martijn to coordinate with Karina and Nate to align expectations.
  • Martijn mentioned a request from Canadian and Dutch law enforcement to present during an upcoming F2F (possibly October).
    • To be discussed in future meetings.
  • Attendees are encouraged to suggest other F2F agenda items via email.

Microsoft PQC Announcement

4. Ballot Updates

CSC-30 – Aligning CSCWG BRs with SCWG Ballots

  • Marco identified an issue in section 8.7.
  • Corey plans to incorporate the fix into CSC-30.
  • Plan is to start the discussion period on Monday, June 3.
  • Ballot will go to voting during or just after the F2F meeting.

PQC Draft Ballot

  • Nate confirmed Microsoft has reviewed and approved the current draft.
  • Sectigo has agreed to endorse.
  • One more endorser is still needed.
  • Corey invited participants to review and endorse.
  • If no endorsement is received before the F2F, will ask again then.
  • Martijn suggested running ballots sequentially to avoid conflicts.

5. Any Other Business

  • No additional items were raised.

6. Next Meeting

  • Scheduled as an in-person Face-to-Face (F2F) on June 12, 2025.
  • Participants encouraged to prepare and submit agenda items in advance.

7. Adjourn

Attendees

Brian Winters (IdenTrust), Bruce Morton (Entrust), Corey Bonnell (DigiCert), Inaba Atsushi (GlobalSign), Iñigo Barreira (Sectigo), Marco Schambach (IdenTrust), Martijn Katerbarg (Sectigo), Nate Santiago (Microsoft), Nome Huang (TrustAsia), Roberto Quionones (Intel), Scott Rea (eMudhra)

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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