Bio-metric access control systems tie a unique physical attribute of a user to the data that they are allowed to access. The most common bio-metric access systems use fingerprints, but these systems can also use iris and retinal scans, hand geometry, and facial recognition technology.
A Bio-metric device is a security identification and authentication device. Such devices use automated methods of verifying or recognizing the identity of a living person based on a physiological or behavioral characteristic. These characteristics include fingerprints, facial images, Iris prints and voice recognition.