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...Overview what is biometrics why general biometric system different types of uses and applications challenges to the science verifying establishing identity an individual through physiological features or behavioral traits characteristics fingerprint face iris hand geometry o voice keyboard strokes signature with numerous devices traditional paradigm user name password based scenarios are not practical only authorized users should have access data services provide unobtrusive convenient authentication mechanism advantages uniqueness no need remember passwords carry tokens cannot be lost stolen forgotten more secure than a long solves repudiation problem susceptible dictionary attacks determine authenticate identification systems who am i verification claim...