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...Biometrics is the study of automated methods for uniquely recognizing humans based upon one or more intrinsic physical behavioral traits biometric authentication refers to technologies measuring and analyzing human characteristics purposes http en wikipedia org wiki copyright by helene g kershner physiological face fingerprint dna signature voiceprint gait cubs buffalo edu about shtml issues concerns technology has potential do great things it also brings with harm are surrounding use real imagined our prevent us from seeing vast new developed using this could happen planted at scene crime assume another s identity person simulating their in way impersonate them without arousing suspicion fool a detector piece sticky tape an authentic on iris recognition camera showing photo hack into interface between device host system so that fail message gets converted pass measurements difficult forge since problematic when lost stolen...