Biometric identifiers are often categorized as physiological characteristics which are related to the shape of the body. Examples include, but are not limited to fingerprint, palm veins, face recognition, DNA, palm print, hand geometry, iris recognition, retina, odor/scent, voice, shape of ears and gait.
Biometrics are becoming more common as an alternative to traditional passwords and PINs because they are unique to each person. Once captured, the biometric is compared and matched in a database. Biometrics can be used in many applications, including law enforcement, military, border control, travel, migration, healthcare, and subsidies.
1. Physiological measurements
Fingerprints, hand shape, finger vein patterns, eye iris and retina, face shape, palm veins, DNA, odor/scent, shape of ears, and gait