Abstract
The use of hand's geometry is the most popular method employed for access control particularly in the USA. In France this technique is not used very often. It requires a special tray, having guides to position fingers, which is rather cumbersome. However biometrics by the shape of the hand is a popular technology which is largely employed for physical access control or time pointing. It is a very simple and cheap system. The element used for the identification is only hand geometry and not the palmar print. The reader of the contour of the hand offers a very reasonable level of exactitude, but can have high rates of false acceptances for twins or other members of the same family.
