COMPUTER NETWORKING

Detailed explanation-1: -A message authentication code (MAC) is similar to a cryptographic hash, except that it is based on a secret key. When secret key information is included with the data that is processed by a cryptographic hash function, the resulting hash is known as an HMAC.

Detailed explanation-2: -Hash-based message authentication code (or HMAC) is a cryptographic authentication technique that uses a hash function and a secret key. With HMAC, you can achieve authentication and verify that data is correct and authentic with shared secrets, as opposed to approaches that use signatures and asymmetric cryptography.

Detailed explanation-3: -In cryptography, a keyed hash message authentication code (HMAC) is a specific type of message authentication code (MAC) involving a cryptographic hash function(hence the ‘H’) in combination with a secret cryptographic key.