It’s a hash-based message authentication code (HMAC) with the time-dependent counter as the message. A HMAC essentially appends a message to your secret key and hashes them together, ...

The National Institute of Standards and Technology is recommending a new algorithm for authenticating digital data for federal agencies. Called CMAC (cipher-based message authentication code), the ...

MAC – meet HMAC. Enter the dragon that is the Message Authentication Code (MAC), and its more secure cousin the hash-based Message Authentication Code (HMAC).

HMAC (Hash-based Message Authentication Code) is an algorithm for calculating a message authentication code (MAC) that involves a cryptographic hash function along with a secret key. It is used to ...