Hash-based message authentication code(HMAC) is a mechanism used for authenticating messages.

It can use any kind of . Its strength depends on the underlying hash function and the chosen secret key. With such a combination, the HMAC verification is then known with a compound name such as HMAC-SHA2.

HMAC is used to ensure both integrity and authentication.

See also

• HMAC on Wikipedia

• RFC 2104 on IETF