BIOMETRICS
Introduction
Biometrics is short for biological metrics—measures of biological identifiers that are traits of individuals. For surveillance purposes, it is preferable to record traits that remain unique throughout a person’s life.
Biometric systems often use chemical tests or optical scanners to identify a person. Common examples include a fingerprint or iris scan offered at an access point, like a customs kiosk, or a fingerprint or saliva sample left on a glass or cigarette stub at a crime scene. Fingerprint dusts, chemicals that reveal blood stains, and scanners that image a person’s facial proportions ...
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