Message authentication code
KEYED HASH FUNCTION USED TO PROTECT A MESSAGE'S INTEGRITY AND AUTHENTICITY
Message Authentication Code; Message Integrity Code; Partial MAC; Message footprint; Message authentication codes; Message-authentication code; Message integrity code; Message Integrity Check; Keyed hash function; Authentication tag
In cryptography, a message authentication code (MAC), sometimes known as a tag, is a short piece of information used for authenticating a message. In other words, to confirm that the message came from the stated sender (its authenticity) and has not been changed.