HTTP registry: hmac-sha256
HMAC using SHA-256
HTTP parameter values extend negotiation, framing, preferences, range handling, or other protocol components. The registry marks this value active; review compatibility before deploying it. hmac-sha256 is active in HTTP Signature Algorithms. Defining reference: RFC 9421, Section 3.3.3.
Identifier (http)
hmac-sha256
HMAC using SHA-256
Interpret parameters only in the context that defines them; unknown parameters must not silently change security or framing behavior. The registry marks this value active; review compatibility before deploying it.
This registry value is currently marked active by IANA. Follow the defining specification before sending, accepting, or proxying it.
IANA registry: http-message-signature/signature-algorithms
Registry reference: RFC 9421, Section 3.3.3