HMAC Generator
Hash & EncryptionGenerate Keyed-Hash Message Authentication Codes (HMAC).
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HMAC Result
About This Tool
Create secure HMAC signatures using a secret key and various hash functions like SHA256. Vital for API security, webhooks, and secure message authentication.
Frequently Asked Questions
HMAC (Hash-based Message Authentication Code) is a specific type of message authentication code involving a cryptographic hash function and a secret cryptographic key for enhanced security.
A regular hash only ensures integrity. An HMAC ensures both integrity AND authenticity because only someone with the secret key can generate the correct code for a given message.
HMACs are widely used in API authentication (like AWS or Stripe), secure cookie storage, and JWT (JSON Web Tokens) to verify that data has not been modified.
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