Biometric security is one of the worst things to happen to security. Personally I hate passwords, but biometrics aren't the answer. How do you revoke the privil

Biometric security is one of the worst things to happen to security. Personally I hate passwords, but biometrics aren't the answer. How do you revoke the privilege when they are compromised? How do you give the keys to someone else? What happens when there is a life changing event that render your biometrics obsolete? Can you still you a gumi bear to fool a fingerprint reader?