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FIPS 198-1

The Keyed-Hash Message Authentication Code (HMAC)

Date Published: July 2008

Supersedes: FIPS 198 (03/06/2002)

Planning Note (8/6/2021): This publication is under review, with public comments accepted through October 1, 2021. See the full announcement and Crypto Publication Review Project for more details.


National Institute of Standards and Technology



cryptography; HMAC; MAC; message authentication; computer security; Federal Information Processing Standards (FIPS)
Control Families

Audit and Accountability; System and Communications Protection; System and Information Integrity


FIPS 198-1 (DOI)
Local Download

Supplemental Material:
None available

Document History:
07/16/08: FIPS 198-1 (Final)


Security and Privacy
message authentication

Laws and Regulations
Federal Information Security Modernization Act