Hash-based message authentication code
- A specific type of message authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key. An HMAC can provide digital signatures using a shared secret instead of public key encryption. It trades off the need for a complex public key infrastructure by delegating the key exchange to the communicating parties, who are responsible for establishing and using a trusted channel to agree on the key prior to communication. ← Wikipedia
- Related terms: KEY · Message authentication code · Surrogate key · Number sign
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