Hash-Based Message Authentication Code (HMAC)
Search Security, Tuesday, May 2,2023
Hash-based Message Authentication Code (HMAC) is a message encryption method that uses a cryptographic key in conjunction with a hash function. It provides the server and the client each with a private key that is known only to that specific server and client, providing a more secure means of encrypting data than a simple Message Authentication Code (MAC).
HMAC is a technique for cryptographic authentication. It uses both a cryptographic hash function and a shared secret key to encrypt information and protect it from unauthorized access. A hash function is an algorithm or mathematical function that converts a message that consists of a variable number of characters into a string with a fixed number of characters. The output value is known as the message digest, hash value or simply hash. The secret cryptographic key is what enables a user to make an encrypted message readable after it has been encrypted by an algorithm.