Primary definition
A message authentication code that uses a cryptographic key in conjunction with a hash function. (FIPS 198; CNSSI-4009) (NISTIR)
Also known asHMAC · keyed-hash MAC · hash-based MAC
1 sources cited4 related termsReviewed Aug 10, 2026
— The Cyber GlossaryView source
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TCG
A message authentication code that uses a cryptographic key in conjunction with a hash function. (FIPS 198; CNSSI-4009) (NISTIR)
The Cyber Glossary · 2024
Cite this term
Permanent URL · stable across revisions
Election Security Glossary. (2026). Keyed Hash Based Message Authentication Code (hmac). In Election Security Glossary. Retrieved August 20, 2026, from https://electionsecurityglossary.com/glossary/keyed-hash-based-message-authentication-code-hmac
Sources
1 cited · last checked Aug 10, 2026
01
The Cyber Glossary
The Cyber Glossary
Single-source
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