Biometric Acccess Systems

There are several forms of biometric identification employed in access control:F

• Fingerprint
• Hand geometry
• Iris
• Face recognition

Using biometric technology increases the security level of the systems as it eliminates problems such as lost, stolen or loaned ID cards, and forgotten or guessed PINs.  For application of time & attendance, it prevents the problem of someone else clocking on another person's behalf.

All biometric readers function by comparing templates stored in its memory to the scan obtained during the process of identification. If the scan match the the template, the ID number of that person is sent to a control panel. The control panel then checks permissions of the user and makes the decision whether to grant access or not.

The communication between the reader and the control panel is usually done in the industry standard Wiegand protocol. The only exception is intelligent biometric readers that do not require any panels and directly control all door hardware.