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HMAC Generator

Generate Hash-based Message Authentication Codes (HMAC-SHA256/SHA512)

About HMAC

HMAC (Hash-based Message Authentication Code) is a cryptographic authentication technique that combines a secret key with a message to create a unique signature. It ensures both data integrity and authenticity.

Common Use Cases

  • API request signing and verification
  • JWT (JSON Web Token) signatures
  • Webhook payload verification
  • Message authentication in encrypted communications
  • Password-based key derivation (PBKDF2)

Security Note: Keep your secret key private and secure. Anyone with the secret key can generate valid HMACs for any message.

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Frequently Asked Questions - HMAC Generator