In cryptography, a MAC (Message Authentication Code), sometimes known as a tag, is a short piece of information used to authenticate a message—in other words, to confirm that the message came from the stated sender (its authenticity) and has not been changed. The MAC value protects both a message’s data integrity as well as its authenticity, by allowing verifiers (who also possess the secret key) to detect any changes to the message content.

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Categories: Cryptography
Tags: Internet, Network
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