The CA/Browser Forum has introduced a new domain validation method through Ballot SC084, referred to as the DNS-Labeled with ACME Account ID Validation Method. This method enhances the security and efficiency of domain validation by linking DNS records directly to an ACME account. With the adoption of Section 3.2.2.4.21 (DNS Labeled with Account ID – ACME) into the Baseline Requirements (BRs), the dns-account-01 challenge is now formally recognized as a valid domain control verification mechanism.
What is the dns-account-01 Challenge?
The dns-account-01 challenge is a DNS-based validation method within the Automated Certificate Management Environment (ACME) protocol. It allows domain verification by associating a DNS record with an ACME account ID, rather than just a specific domain. This approach streamlines the process of proving domain ownership while improving security and scalability for certificate issuance.
Key Advantages of the dns-account-01 Challenge
- Prevention of CNAME Conflicts
Using an account-specific label in DNS validation helps avoid issues related to CNAME delegation conflicts, which can occur with standard dns-01 challenges.
- Simplified Multi-Domain Management
Organizations handling multiple domains under a single ACME account benefit from a more automated and centralized validation process.
- Stronger Security Measures
Since the challenge is tied to an ACME account, it enhances security by reducing the risk of unauthorized modifications to DNS records.
Voting Results
- Certificate Issuers: 19 votes in favor
- Certificate Consumers: 4 votes in favor (Cisco Systems, Google, Microsoft, Mozilla)
The review period for this ballot is from January 28, 2025, to February 27, 2025.
References to Draft RFCs
This ballot references the latest stable versions of the draft RFCs:
- Automated Certificate Management Environment (ACME) DNS-Labeled With ACME Account ID Challenge
- Domain Control Validation Using DNS
This new validation method represents a significant step forward in ensuring secure and efficient domain validation processes.
Sources: https://cabforum.org/working-groups/server/ballots/




