topic Registered
Verified 2026-09-19 · registry updated 2026-07-20

HTTP registry: key

Single key value of Dictionary Structured Fields

HTTP parameter values extend negotiation, framing, preferences, range handling, or other protocol components. key is registered in HTTP Signature Component Parameters. Defining reference: RFC 9421, Section 2.1.2.

httpregistryhttp-message-signaturecomponent-parameters

Identifier (http)

key

Single key value of Dictionary Structured Fields

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/component-parameters

Registry reference: RFC 9421, Section 2.1.2

Sources

Permalink: https://merginit.com/reference/http/registry/http-message-signature/component-parameters/key-102