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 idea ...

Enter the dragon that is the Message Authentication Code (MAC), and its more secure cousin the hash-based Message Authentication Code (HMAC). A MAC is a minimal piece of information used to ...

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 ...