Biometrics is the technical term for body measurements and calculations. It refers to metrics related to human characteristics. Biometrics authentication (or realistic authentication)[note 1] is used in computer science as a form of identification and access control.[1][2] It is also used to identify individuals in groups that are under surveillance.

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Physiological:

1.Fingerprint

2.Hand geometry

3.Iris and retina scan

4.Face recognition

5.DNA

Behavication:

1.Voice recognition

2.Sinnature verfication

3.Keystrike verfication

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