HMAC-SHA512 Generator

Generate HMAC-SHA512 keyed-hash message authentication code for secure message verification.

Secret Key
Enter your secret key
Message
Enter text to authenticate
HMAC-SHA512
512-bit authentication code

What is HMAC-SHA512?

HMAC-SHA512 combines the SHA512 hash function with a secret cryptographic key to provide message authentication. It verifies both data integrity and authenticity.

Key Features

  • Message Authentication: Verifies integrity and authenticity
  • Secret Key Required: Uses a shared secret key
  • Fixed Output: 512-bit hash (128 hex characters)
  • Secure: Industry-standard authentication method

Common Use Cases

  • API Authentication: Verify API requests and responses
  • JWT Tokens: Sign JSON Web Tokens
  • Message Verification: Ensure messages haven't been tampered
  • Webhook Signatures: Verify webhook authenticity
  • Data Integrity: Combine integrity with authentication

Example

Message: Hello, World! Secret Key: secret-key-123 HMAC-SHA512: Authentication code generated from message and key