Checks the key binding (RFC 9767 section 2.1.4): a bound token must be presented with the key it names; a bearer token presented with a key is accepted.
the token's confirmation
the confirmation of the key presented
a refusal, or null
Checks the key binding (RFC 9767 section 2.1.4): a bound token must be presented with the key it names; a bearer token presented with a key is accepted.