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Biometrics can be used for two basic purposes like for verification and for identification of users. It is the most convenient and secure tool. Biometrics measures individual's behavioral characteristics and to authenticate identity. Physical biometrics includes retina, finger prints, facial characteristics, etc.

Biometric Technologies

Finger prints

Fingerprints vary from person to person by the pattern found on their fingertip. Varieties of approaches are there for fingerprint verification, pattern matching device, ultrasonic, traditional police method, etc.

Retina

This involves analyzing the layer of blood vessels situated at back of the eye. Low intensity light source is used to scan the unique pattern of the retina by using optical coupler.

Signature

Analyzing the way user signs his name is verified by this. Features of signature such as speed, velocity and pressure are as important as statistic shape of the finished signature.

Voice

Technologies are there to transform voice to text format. This biometrics requires microphones. PINs, passwords, account names can be replaced by voice biometrics.

Face

Facial image can be captured through digital camera for user authentication. Casino industry has capitalized on this database to develop a facial database of scam artists for quick detection.

Iris

Colored ring of tissues surrounded the pupil can be analyzed by this type of biometrics. Close contact between the user and reader is not required, because of using the fairly conventional camera element.

Selecting a biometric technology

Some key points to be taken into account before selecting one of the biometrics

· Ease of use

· Error incidence

· Accuracy

Biometric is one of the tool used to authenticate and identify a person's identity and provides security.

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