Idea of a Biometric Scanner

The prime goal of this article is to know about idea of a biometric scanner. Star Wars was the opening movie who prepared use of the idea of biometric scanners. They were used to increase entrance to all entrance in the space ship of Darth Vader. Aliens and humans similar had to press their hand unto the biometric scanner. If the device will be capable to recognize the hand that was pressed on the device, the door will release. If it does not know the personality of the person, the alarm would ring and guards will rush to the region.