Get the Whitepaper called A Penetration Testers Guide to Finger Print Authentication.
You can download it from the following link: https://packetstormsecurity.com/files/download/98819/Null_Hacking_Biometrics.pdf
Source: https://packetstormsecurity.com/files/98819/A-Penetration-Testers-Guide-To-Finger-Print-Authentication.html