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Message authentication code

nounid 3247·updated May 9, 2026
candidate

A cryptographic checksum on data that uses a symmetric key to detect both accidental and intentional modifications of the data. MACs provide authenticity and integrity protection, but not non-repudiation protection.

polysemousMWE

Classifications

Entity Type

Control85%llm-generatedllm:claude-haiku-4-5

Sensitivity

unclassified

Information Class

unclassified

Variants

acronym
MAC
plural
Message authentication codes
possessive
Message authentication code's
pluralpossessive
Message authentication codes'

Framework definitions

ISACA Cybersecurity Glossary1 senseview framework →
§1
An American National Standards Institute (ANSI) standard checksum that is computed using Data Encryption Standard (DES)
NISTIR 7298: Glossary of Key Information Security Terms, Revision 23 sensesview framework →
§1
A cryptographic checksum on data that uses a symmetric key to detect both accidental and intentional modifications of the data. MACs provide authenticity and integrity protection, but not non-repudiation protection.
§2 · sense_2_pending_review
A cryptographic checksum that results from passing data through a message authentication algorithm.
§3 · sense_3_pending_review
1. See Checksum. 2. A specific ANSI standard for a checksum.
CNSSI-4009 (Glossary of Information Assurance Terms)1 senseview framework →
§1
1. See Checksum. 2. A specific ANSI standard for a checksum.
NIST SP 800-631 senseview framework →
§1
A cryptographic checksum on data that uses a symmetric key to detect both accidental and intentional modifications of the data. MACs provide authenticity and integrity protection, but not non-repudiation protection.
FIPS PUB 2011 senseview framework →
§1
A cryptographic checksum on data that uses a symmetric key to detect both accidental and intentional modifications of the data. MACs provide authenticity and integrity protection, but not non-repudiation protection.
FIPS PUB 1981 senseview framework →
§1
A cryptographic checksum that results from passing data through a message authentication algorithm.

Outgoing relationships

No outgoing triples
This term is not the subject of any RDF-style relationship yet.

Incoming relationships

No incoming triples
No other term currently asserts a relationship to this one.