Scheduled maintenance will take place between 6:00 PM ET and 7:00 PM ET on March 10th, 2026. During that time, this site may be temporarily unavailable for a period of approximately two minutes.
Publications
Withdrawn on
July 29, 2008.
Superseded by
FIPS 198-1
The Keyed-Hash Message Authentication Code (HMAC)
Documentation
Topics
Date Published: March 6, 2002
Author(s)
National Institute of Standards and Technology
This standard describes a keyed-hash message authentication code (HMAC), a mechanism for message authentication using cryptographic hash functions. HMAC can be used with any iterative Approved cryptographic hash function, in combination with a shared secret key. The cryptographic strength of HMAC depends on the properties of the underlying hash function. The HMAC specification in this standard is a generalization of Internet RFC 2104, HMAC, Keyed-Hashing for Message Authentication, and ANSI X9.71, Keyed Hash Message Authentication Code.
This standard describes a keyed-hash message authentication code (HMAC), a mechanism for message authentication using cryptographic hash functions. HMAC can be used with any iterative Approved cryptographic hash function, in combination with a shared secret key. The cryptographic strength of HMAC...
See full abstract
This standard describes a keyed-hash message authentication code (HMAC), a mechanism for message authentication using cryptographic hash functions. HMAC can be used with any iterative Approved cryptographic hash function, in combination with a shared secret key. The cryptographic strength of HMAC depends on the properties of the underlying hash function. The HMAC specification in this standard is a generalization of Internet RFC 2104, HMAC, Keyed-Hashing for Message Authentication, and ANSI X9.71, Keyed Hash Message Authentication Code.
Hide full abstract
Keywords
computer security; cryptography; HMAC; MAC; message authentication; Federal Information Processing Standard (FIPS)
Control Families
None selected
Documentation
Publication:
FIPS 198 (pdf)
Supplemental Material:
None available
Document History:
03/06/02: FIPS 198 (Final)
