Why biometrics are bad authenticators

The Chaos Computer Club, a Germany based hacker collective with a rich history of publicly demonstrating security risks, published an article describing how it had broken the new iPhone Biometric authentication service. They used tools and techniques originally developed in 2004 to fool the iPhone fingerprint sensor. 

"The biometrics hacking team of the Chaos Computer Club (CCC) has successfully bypassed the biometric security of Apple's TouchID using easy everyday means. A fingerprint of the phone user, photographed from a glass surface, was enough to create a fake finger that could unlock an iPhone 5s secured with TouchID. This demonstrates - again - that fingerprint biometrics is unsuitable as access control method and should be avoided."

The CCC hacker Starbug, who conducted much of the biometric research, said in 2007, "As we have said now for more than years, fingerprints should not be used to secure anything. You leave them everywhere, and it is far too easy to make fake fingers out of lifted prints."