Biometric system is a verification system by which any one can be identified using different biological characteristics, the unique biological characteristics include fingerprints, retina and iris patterns, voice, DNA, and signatures. It is the science and technology of measuring and analyzing biological data.When any one uses biometric system first time, their recognizing features are stored or captured for future comparison. When biometric recognition is required, the individual biometric characteristics are recognized again and compared with the database for close match. There are two modes one is recognition: and the other is verification.