HMAC Generator

Generates a Hash-based Message Authentication Code (HMAC) signature using a specified message and secret key. The tool supports multiple cryptographic hash functions, including SHA-256, SHA-512, and MD5, allowing users to select the appropriate algorithm for their security needs. It processes user input by combining the data payload with the chosen hashing function and the provided key material to produce a unique, fixed-length signature string. Security professionals, developers, and cryptographers utilize this utility to verify the integrity and authenticity of transmitted data. By generating an HMAC, users can confirm that a message has not been tampered with during transit and originated from a source possessing knowledge of the secret key. This capability is essential for building secure communication channels and implementing robust authentication protocols in software systems.