Later, he presses a button to play a voice recording that deactivates a lock, allowing him access to a top-security biotechnology lab. Biometrics uses physical characteristics for identification. A smart card looks like a credit card and stores the user's print. When the user wants access to a secured system, he inserts the card into a device and scans the appropriate feature. The device checks the digitization to that stored on the identifying card, verifying that he is an authorized user.
Passwords are problematic.
Clients lose them. Crackers steal them. Employees choose words that are too easy to guess. Biometric security outdates the need by users to remember or carry anything. You can't forget your fingerprint or retinal pattern at home - you have everything you need on your body.