Message Authentication Code (MAC) Visualizer

Message Authentication Code (MAC) Visualizer

HMAC Generator

Hash-based Message Authentication Code (HMAC) provides integrity and authenticity.

Message: This is a secret message

Secret Key:

Algorithm: HMAC-SHA1 HMAC-SHA256 HMAC-SHA384 HMAC-SHA512

MAC Verification

Verify message integrity using a received MAC.

Message: This is a secret message

Secret Key:

Received MAC:

MAC Comparison

See how small changes affect the MAC output.

Original Message: Transfer $100 to account 12345

Modified Message: Transfer $900 to account 98765

Secret Key: