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2026-05-07 Minutes of the Server Certificate Working Group

Minutes:

Meeting Title: CA/Browser Forum SCWG Teleconference

Date: 7 May 2026

Chair: Dimitris Zacharopoulos

Minutes Taken By: Lynn Jeun

1. Begin Recording - Roll Call

Meeting called to order by Dimitris Zacharopoulos.

2. Reading of Note-well

Dimitris read the note-well.

3. Review of Agenda

No changes

4. Minutes approval

March 10, 2026 F2F#67 SCWG Meeting - Approved

April 9, 2026 Teleconference – Draft minutes have not been distributed yet

April 23, 2026 Teleconference - Draft minutes have not been distributed yet

5. Membership applications

No application

6. Ballot Status

In Voting Period

  • SC098v2: Process RFC 8657 CAA Parameters (End of voting : May 11)

Under IPR Review

  • SC099: Improve Recording of Validation Method (IPR Review ends 2026-05-18 18:00:00 UTC)

Cleared IPR Review, New Guidelines

  • SC095: Clean-up 2025 (EV Guidelines version 2.0.2 with effective date 2026-05-04 to be published)

Draft / Under Consideration

  • SC087: Registration Number Improvement for EV Certificates - Corey resolved all cleanup ballot merge conflicts, adjusted the effective date to avoid a validation cliff, confirmed alignment with endorsers, and plans to start the discussion period by Monday.
  • SC101: Clarify Authorization Domain Names – No update
  • SC0XX: Improve Certificate Problem Reports and Clarify the Meaning of Revocation – No update
  • SC0XX: Allow ML-DSA(PR#622, PR#624)
    • Corey noted differences between the two proposals and emphasized the need to align them and clarify overall motivation.
    • Dimitris expressed preference for a more flexible approach in algorithm handling.
    • Chris raised concerns about unclear justification and highlighted risks to the Certificate Transparency (CT) ecosystem, especially scalability impacts.
    • Martijn warned that larger ML-DSA signatures could significantly strain CT log infrastructure.
    • Trevoli Ponds questioned whether CT-related constraints should influence Baseline Requirements decisions.
    • Participants noted uncertainty around the Microsoft pilot program and overall ecosystem readiness.
    • Further discussion is required to clarify motivation, address CT concerns, and gather additional input (including Microsoft feedback) before proceeding.

7. Any other business

8. Next call: May 21, 2026

9. Adjourn

Attendees

Aaron Poulsen (SSL.com), Adriano Santoni (Actalis), Andrea Holland (IdenTrust), Atsushi INABA (GlobalSign), Ben (Chunghwa Telecom), Ben Wilson (Mozilla), Chad Dandar, Chris Clements (Google Chrome), Clint Wilson(Apple), Corey Bonnell (DigiCert), Corey Rasmussen (OATI), Cynetheia Brown (FPKIMA), Dean Coclin (DigiCert), Dimitris Zacharopoulos (HARICA), Dustin Hollenback, Eric Kramer (Sectigo), Georgy Sebastian (Amazon Trust Services), Greg Tomko (GlobalSign), Hazhar Ismail (MSC Trustgate), Hogeun Yoo (NAVER CLOUD), Inigo Barreira(Sectigo), Janet Hines (SSL.com), Jeff Ward (Aprio), Johnny Reading (GoDaddy), John Mason (Microsoft Corp), Jos Purvis (Fastly), Jun Okura (Cybertrust), Karolina Ruszczynska (Certum), Kateryna Aleksieieva (Certum by Asseco), Kiran Tummala(Microsoft), kiran Tummlala (Apple), Lucy Buecking (IdenTrust), Luis Cervantes (SSL.com), Luis Osses (Amazon Trust Services), Mahua Chaudhuri (Microsoft), Martijn Katerbarg (Sectigo), Masaru Sakamoto (Cybertrust Japan), Matthew McPherrin (ISRG), Michael Slaughter (Amazon Trust Services), Michelle Coon(OATI), Miguel Sanchez (GTS), Nate Smith (GoDaddy), Nome Huang (TrustAsia), ONO Fumiaki (SECOM Trust Systems), Paul van Brouwershaven (Digitorus), Peter Miskovic (Disig), Rebecca Kelley (SSL.com), Rich Smith (DigiCert), Rob White (GoDaddy), Rollin Yu (TrustAsia), Roman Fischer (SwissSign), Sándor SZŐKE, dr. (Microsec), Sandy Balzer (SwissSign), Scott Rea (eMudhra), Sean Huang (TWCA), Stephen Davidson (DigiCert), Steven Deitte (GoDaddy), Tadahiko ITO (SECOM), Thomas Zermeno (SSL.com), Tim Callan (Sectigo), Tobias Josefowitz (Opera), Trevoli Ponds-White (Amazon Trust Services), Tsung-Min Kuo (Chunghwa Telecom), wendy brown (FPKIMA).

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).