An interesting and sobering article...
http://[url]www.counterpane.com/crypto-gram-0205.html#5[/url]


An excerpt:
Tsutomu Matsumoto, a Japanese cryptographer, recently decided to look at biometric fingerprint devices. These are security systems that attempt to identify people based on their fingerprint. For years the companies selling these devices have claimed that they are very secure, and that it is almost impossible to fool them into accepting a fake finger as genuine. Matsumoto, along with his students at the Yokohama National University, showed that they can be reliably fooled with a little ingenuity and $10 worth of household supplies.

Cool-this looks like it might be fun to try...

Juggernaut