topic Registered
Verified 2026-09-19 · registry updated
2026-07-20HTTP registry: nonce
A single-use nonce value
HTTP parameter values extend negotiation, framing, preferences, range handling, or other protocol components. nonce is registered in HTTP Signature Metadata Parameters. Defining reference: RFC 9421, Section 2.3.
httpregistryhttp-message-signaturesignature-metadata-parameters
Identifier (http)
nonce
A single-use nonce value
Interpret parameters only in the context that defines them; unknown parameters must not silently change security or framing behavior.
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-metadata-parameters
Registry reference: RFC 9421, Section 2.3