Fingerprint Authentication

A form of biometric authentication that uses a persons fingerprint imprint to uniquely identify them.

This approach suffers from [see page 2, various] issues, including:

Enrolment - Purchase (acquire) fingerprints from someone else
Compromise the reader
Compromise the communications from the reader to the server
Compromise the central database (storing recorded fingerprints)
Breath on (or cover with powder) the sensor plate to reveal recorded fingerprints
Create a dummy finger :?
Chop off someone's finger and use it to authenticate
Threaten (coerce) the user
Re-use biometrics once the user has left the system (should delete after usage).

See [see page 2, here] for a mindmap of the steps you should take to secure a fingerprint system.