The technique of scientific verification which is mainly supported by biology is ‘Biometric’ and utilized for IA i.e., Information Assurance. It is the analysis and measurement of people’s distinctive features, which comprises behavioral and physical attributes. Biometric authentication is the method mostly applied for recognition or for ascertaining persons. This modern way of identifying and authenticating humans will soon be replacing all the Identity Cards or Personal Identification Number (PIN). The most important factor of biometrics, as compared to others, is that it requires the physical presence of a person which cannot be forged. The method for Biometric authentication of a person is based on biological facts and data. The crucial basis is that each human will be precisely recognized by her or his natural (behavioral or physical) qualities.