Biometric security is used to identify a person. This can be used for door locks and authentication for security measures. Biometric access control is of paramount importance to prevent someone from breaking in to a system or building. Biometric devices include fingerprint scanners and sensors, thumb readers, palm, vein and face recognition systems. Expanding
technologies include voice identification and behaviour recognition systems such as gait and typing rhythm detection. Other detection systems include DNA, palm print, hand geometry, iris recognition, retina and odour/scent software, technology systems, portable readers and modular systems.