ABSTRACT
Biometrics refers to the study of biological characteristics. It comes from Greek words “bios” (implies life) and “metricos” (implies measuring/to measure). Biometrics can be considered as use of physiological or behavioral characteristics in an automated way to determine identity. The identity verification is performed through the measurement of physiological or behavioral characteristics of an individual. Researchers have proposed a number of biometric techniques for human identification and authentication based on fingerprint, palm print, hand geometry, face, ear, iris, retina, voice, signature, body odor, and so on.
