Hash-based message authentication code (HMAC)

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wikipedia:HMAC is used to verify data integrity and authenticity of a message using a cryptographic hash function and a secret cryptographic key.

HMAC is used within the IPsec, SSH and TLS protocols and for JSON Web Tokens.

TLS Error: cannot locate HMAC in incoming packet from [AF_INET6]::ffff:10.156.0.97:45318

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