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.
SOURCE: SP 800-63; FIPS 201
A cryptographic checksum that results from passing data through a message authentication algorithm.
SOURCE: FIPS 198
1. See Checksum.
2. A specific ANSI standard for a checksum.