Learn about message authentication codes, Hash-Based Message Authentication Code, and non-repudiation.

We'll cover the following

Hash-Based Message Authentication Code (HMAC) is a type of MAC that can, at least in theory, be constructed from any cryptographic hash function. That’s why it’scommon to see HMAC to be more precisely referred to as, for example, HMAC-MD5, where the suffix identifies the name of the underlying hash function.

The design of HMAC is very simple. Let hh be a hash function, and let K1K_1 and K2K_2 be two symmetric keys. Then the MAC on message MM is computed as follows:

Get hands-on with 1200+ tech skills courses.