I'm currently new to Claim Based Model and Secure Token Service.
I have successfully installed thinktecture identity server and tested it. The next step that i would like to make , is to change the login method from the normal method of user name and password to another biometric method (actually a fingerprint) ,
i.e. i would like to know how to make the thinktecture server to accept biometric data (where do I have to tune) rather than the user name and the password.
There's nothing built-in for that. You would need to do that yourself. The obvious place to start would be the login view/controller.