Definition:
The statistical use of the characteristic variations in unique elements of living organisms is known as biometrics.

Why we need biometrics?
In order to avoid the problems of forgetting passwords and ID codes, Biometrics based authentication helps us in verifying your finger prints, iris pattern and voice for your identity at A.T.M‟s, Airports etc.., you can unlock your houses, withdrawing money from a bank with just a blink of an eye, a tap of your finger or by just showing your face.