HMAC Generator

Generate Hash-based Message Authentication Codes (HMAC) using various hash algorithms. HMAC provides a way to verify both the data integrity and the authenticity of a message.

Input

Generate HMAC

Hash Algorithm:

Output Format:

Output in uppercase

Secret Key:

The secret key is used to create the HMAC and verify the authenticity of the message.

Message:

File HMAC

Upload a file to generate its HMAC:

Choose FileNo file selected

Output

Result will appear here

About HMAC

HMAC (Hash-based Message Authentication Code) is a specific type of message authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key.

It can be used to simultaneously verify both the data integrity and authenticity of a message. Any cryptographic hash function, such as SHA-256 or SHA-3, may be used in the calculation of an HMAC.

HMAC is widely used in security protocols like TLS/SSL, IPsec, and OAuth. It provides stronger security than using plain hashes by protecting against various attacks, including replay attacks and hash function collisions.

The security of an HMAC depends on the size of the secret key, the size of the hash output, and the strength of the underlying hash function. For most secure applications, HMAC-SHA256 or HMAC-SHA512 is recommended.