The client certificate used in the TLS connection between the client application and the backchannel authentication endpoint of the OpenID provider.

The client certificate path presented by the client during client authentication.

The client ID extracted from Authorization header of the backchannel authentication request from the client application.

The client secret extracted from Authorization header of the backchannel authentication request from the client application.

The value of parameters which are the request parameters that the backchannel authentication endpoint of the OpenID provider implementation received from the client application.