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This paper present a state of art about biometric hand, different techniques used. Biometric is essentially used to avoid risks of password easy to find or Stoll; with as slogan save Time and Attendance. The authors can note that biometrics is a true alternative to the passwords and other identifiers to make safe the access controls. It makes it possible to check that the user is well the person who it claims to be. Biometrics is in full growth and tends to join other technologies of safety like the smart card.
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