HMAC-SHA1

HMAC-SHA1 is a secure method used to verify that data hasn't been tampered with and that it comes from a trusted source. It combines a secret key with the message data and processes them through the SHA-1 algorithm, producing a unique code called a hash. If the data changes or the key isn't correct, the hash will differ, signaling possible tampering or forgery. This process ensures message integrity and authenticity in digital communications, making HMAC-SHA1 a reliable tool for secure data exchange.