Biometric authentication is based on the measurement of an individual’s unique physiological and behavioral characteristics. The most common measurement such as fingerprints, hand geometry ,facial features , and eye patterns are physiological biometrics. Some of the more novel measurements, such as body odor, brain wave patterns, DNA, ear shape, sweat pores, and vein patterns also fall into the category of physiological biometrics . Voice scan and signature scan are examples of behavioral biometrics. Any biometric technology process involves two basic steps – enrollment and matching. To illustrate these steps, this infographic demonstrate those two process for the most common biometric technology use finger scan technology.