The term biometrics is derived from the Greek
words bio meaning “life” and metrics meaning “ to measure” .
Biometrics refers to the identification or verification of a person
based on his/her physiological and/or behavioral characteristics.
Several verification/identification based biometrics have
evolved based on various unique aspects of human body, ease
of acquiring the biometric, public acceptance and the degree of
security required. This paper presents an overview of various
biometrics in use/proposed and their applicability to different