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HMAC (Hash-based Message Authentication Code) is a cryptographic authentication technique that uses a hash function and a secret key to verify data integrity and authenticity. It's widely used in API authentication, webhook verification, and secure communications.
HMAC combines a cryptographic hash function (like SHA-256) with a secret key to produce a signature. This signature can be used to verify that a message hasn't been tampered with and comes from a trusted source.
API Authentication: Sign API requests to prove they come from an authorized source.
Webhook Verification: Verify webhook payloads from services like Stripe, GitHub, and Shopify.
Data Integrity: Ensure data hasn't been modified during transmission.
JWT Signing: Sign JSON Web Tokens for secure authentication.
Message Authentication: Verify the authenticity of messages in secure communications.
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