Biometric access control security is a security system that uses biometric data to grant or deny access to a secured area. Biometric data is a person's unique physical characteristics, such as fingerprints, facial recognition, iris or retina scans, hand geometry, or voice recognition. This type of security can be used in conjunction with other security methods, such as access codes or cards, to grant or deny access to an area.

Biometric access control security is popular because it is accurate and reliable. It also cannot be copied or stolen like an access code or card can. However, it may have limitations such as the use of specific equipment or software to collect and process biometric data and it may reveal sensitive personal information.