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Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Projects Message Authentication Codes

Message Authentication Codes MAC

News and Updates

Proposed Withdrawal of FIPS 198-1 (HMAC)
June 23, 2025
NIST's proposal to withdraw Federal Information Processing Standard (FIPS) 198-1, HMAC, has been announced in the Federal Register. Comments are due July 23, 2025.
HMAC Specification: Draft SP 800-224
June 28, 2024
The initial public draft (ipd) of NIST Special Publication (SP) 800-224. The public comment period is open through September 6, 2024.
Withdrawal of NIST SP 800-107 Revision 1
December 20, 2022
NIST has decided to withdraw Special Publication 800-107 Revision 1 after moving some of its requirements to a new CMVP Implementation Guidance (IG).
Decision to Convert FIPS 198-1 to a NIST Special Publication
November 4, 2022
After considering two rounds of public comments, NIST has decided to convert FIPS 198-1, "The Keyed-Hash Message Authentication Code (HMAC)" to a NIST Special Publication.
Proposal to Withdraw SP 800-107 Rev. 1
June 8, 2022
NIST is proposing to withdraw Special Publication (SP) 800-107 Revision 1. Please submit public comments by July 30, 2022. 

Contacts

Quynh Dang
[email protected]

Topics

Security and Privacy: message authentication

Created January 04, 2017, Updated June 23, 2025