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Information for Auditors and Assessors

To increase trust in the application of PKI technology, the CA/Browser Forum has mandated that a CA, in order to issue Publicly-Trusted Certificates, obtain an audit report under a qualified audit scheme performed by a qualified auditor.

In order to issue SSL certificates, most CAs will need to complete an approved independent third-party audit. There are three alternatives. The first is an audit against WebTrust for Certification Authorities criteria, issued by the WebTrust for Certification Authorities Task Force-a joint task force of the American Institute of Certified Public Accountants and the Chartered Professional Accountants of Canada (CPA Canada). Specifically, WebTrust for Certification Authorities and WebTrust for Certification Authorities – SSL Baseline Requirements Audit Criteria have been developed to meet the CA/Browser Forums Baseline SSL Requirements.

Another alternative for an independent third-party audit is an audit that conforms to ETSI EN 319 411-1 or ETSI EN 319 411-2. These standards are published by the European Telecommunications Standards Institute (ETSI).

Also available, but rarely used is an audit that conforms to ISO 21188:2006.

In addition, recognizing the importance of an independent third party audit of the controls, processes and procedures of CAs, the CA/Browser Forum’s EV Guidelines include a specific audit requirement for CAs that wish to issue EV certificates.

A non-governmental CA issuing EV Certificates needs to undergo an audit in accordance either the WebTrust for Certification Authorities audit and the WebTrust EV Program audit, or the ETSI EN 319 411-1 audit.

Latest releases
Server Certificate Requirements
SC-081v3: Introduce Schedule of Reducing Validity and Data Reuse Periods - May 21, 2025

BR v2.1.5

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
v1.0.9 - Ballot SMC011 - May 14, 2025

This ballot allows the option to use a European Unique Identifier (EUID) as a Registration Reference in the NTR Registration Scheme. The EUID uniquely identifies officially-registered organizations, Legal Entities, and branch offices within the European Union or the European Economic Area. The EUID is specified in chapter 9 of the Annex contained in the Implementing Regulation (EU) 2021/1042 which describes rules for the application of Directive (EU) 2017/1132 “relating to certain aspects of company law (codification)”. The ballot also includes several editorial corrections, (e.g., reordering of References and regrouping of information from Appendix A to Section 7.1.4.2.2 (d)). This ballot is proposed by Stephen Davidson (DigiCert) and endorsed by Adrian Mueller (SwissSign) and Adriano Santoni (Actalis).

Network and Certificate System Security Requirements
v2.0 - Ballot NS-003 - Jun 26, 2024

Ballot NS-003: Restructure the NCSSRs in https://github.com/cabforum/netsec/pull/35

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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).