Official websites use .gov
A .gov website belongs to an official government organization in the United States.
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.
Proposed Withdrawal of FIPS 198-1, Keyed-Hash Message Authentication Code (HMAC)
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.
Released June 23, 2025