thumbprint - What's the meaning of the “kid” claim in a JWT token?
token authentication (2)
kid is an optional header claim which holds a key identifier, particularly useful when you have multiple keys to sign the tokens and you need to look up the right one to verify the signature.
Once a signed JWT is a JWS, consider the definition from the RFC 7515:
kid(key ID) Header Parameter is a hint indicating which key was used to secure the JWS. This parameter allows originators to explicitly signal a change of key to recipients. The structure of the
kidvalue is unspecified. Its value MUST be a case-sensitive string. Use of this Header Parameter is OPTIONAL.
When used with a JWK, the
kidvalue is used to match a JWK
I generated a JTW token and there are some claims which I understand well, but there is a claim called
kid in header. Does anyone know what it means?
I generated the token using auth0.com
kid (key ID) claim is an optional header claim, used to specify the key for validating the signature.