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2025-06-26 Minutes of the Code Signing Certificate Working Group

Certificate Signing Certificate Working Group (CSCWG) – Meeting Minutes

Date: June 26, 2025

Note Well

The Note Well was read.

Review of Agenda

Agenda reviewed and accepted with the addition of a PQC ballot discussion requested by Brianca.

Approval of Minutes

  • 15 May minutes: Approved without objections.
  • 29 May minutes: Deferred approval to the next meeting due to late distribution.

Discussion Topics

PQC Ballot

  • Corey confirmed readiness, pending input from Microsoft.
  • Karina stated Microsoft is currently not ready to support the ballot, citing ongoing internal evaluations of PQC implications.
  • Brianca raised a concern about halting community progress based on one company’s readiness.
  • Scott suggested shelving the ballot temporarily until Microsoft or other consumers indicate readiness.
  • Bruce raised concerns regarding the voting structure and its appropriateness given the limited number of certificate consumers.
  • Consensus: PQC ballot shelved temporarily until conditions change (either Microsoft readiness or additional consumer engagement).

CSC-30 Ballot Failure and Future Actions

  • Martijn expressed concern over repeated failures of similar ballots (CSC-28, CSC-29, CSC-30) and is hesitant to request further effort without clear progress.
  • Karina acknowledged delays due to recent internal team changes at Microsoft.
  • Nate agreed to follow up internally on another ballot driven by Microsoft, recognizing a pressing deadline.
  • Corey suggested discussing the possibility of splitting CSC-30 into multiple ballots during the next meeting.

Any Other Business

No other business.

Next Meeting

July 10th

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).