Cakephp with Biometry solution

I have a web application where when someone register we want to take his thumb expression. So we want a simple program where we want help that biometry device take thumb expression and we save that through cakephp program in database. When we issue books to same registered member then we will again take his thumb expression and we will match with already taken thumb expression if both match then we issue him books So if someone is able to implement then discuss with us Thanks