RFC 9905
Deprecating the Use of SHA-1 in DNSSEC Signature Algorithms, November 2025
- File formats:

- Also available: XML file for editing
- Status:
- PROPOSED STANDARD
- Updates:
- RFC 4034, RFC 5155
- Authors:
- W. Hardaker
W. Kumari - Stream:
- IETF
- Source:
- dnsop (ops)
Cite this RFC: TXT | XML | BibTeX
DOI: https://doi.org/10.17487/RFC9905
Discuss this RFC: Send questions or comments to the mailing list [email protected]
Other actions: Submit Errata | Find IPR Disclosures from the IETF | View History of RFC 9905
Abstract
This document deprecates the use of the RSASHA1 and RSASHA1-NSEC3-SHA1 algorithms for the creation of DNS Public Key (DNSKEY) and Resource Record Signature (RRSIG) records.
It updates RFCs 4034 and 5155 as it deprecates the use of these algorithms.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.