I published a short article about the history of strong authentication during the last 33 years – starting with Admiral James T. Kirk accessing the Genesis project data with a retina scan.
Well, personally I am really not convince to use biometrics for authentication. Have you ever tried to revoke your biometrics? Bad idea.
Thus biometrics are better used to monitor your movements till your death than to authentication to a computer system!
You should use privacyIDEA!
This is the blog post on the Univention blog (German!).
Update: (May 03) It is also available in english.