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Bio-metrics is modern security system. It uses a person’s biological features to give access rights. The biological features like finger print, voice print, iris pattern, face print, signature(dynamic), retina, hand geometry, ear form , DNA, odor, keyboard stroke, finger geometry, vein structure of back of hand etc. are used. So, in this any unauthorized person cannot trap the information or assets. Today, to prevent illegal operations this technique is widely used. It is a user-friendly technique, which is accepted by almost all fields.