Biometric Products

Is biometric authentication more secure than password based authentication?
It is a matter of fact that the security of password-protected values in particular depends on the user. If the user has to memorize too many passwords, he will use the same passwords for as many applications as possible. If this is not possible, he will go to construct very simple passwords. If this will also fail (e.g., if the construction rules are too complex), the next fall-back stage is to notify the password on paper. In this case, and that seems to be the normal case, it can be said that biometrics has considerable advantages.
Contrariwise, passwords feature unbeatable theoretic protection ability: an eight-digit password, which is allowed to contain any symbol from an 8-bit alphabet, offers 10 20 possible combinations! This is a real challenge for any biometric feature. The requirements are obvious: such a password is maximally difficult to learn, it must not be written down, it must not be passed to anyone, the input must take place absolutely secret, it must not be extorted, and the technical implementations must be perfect. However, it can be assumed that the protection of biometric feature acquisition is not easier than the acquisition of the password, provided the implementation expense is comparable.
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