HMAC -->
Keyed-Hashing Message Authentication
computing dictionary

<messaging, cryptography> (HMAC) A mechanism for message authentication using cryptographic hash functions. HMAC can be used with any iterative cryptographic hash function, e.g., MD5, SHA-1, in combination with a secret shared key. The cryptographic strength of HMAC depends on the properties of the underlying hash function.

[RFC 2104].

Acronym: HMAC

(01 Mar 1997)