ABSTRACT
Authentication is the key parameter to speak the truth of an attribute claimed by the real entity. There are several
ways to make authentication more robust and biometrics is one among them. From past decade, Biometric
technology is widely adopted and accepted everywhere to authenticate an individual’s identity. Also the adopted
technology overcomes the limitations faced by the traditional authentication process such as knowledge based
issues including password and token for the authentication of an individual. This paper makes a comprehensive
study of the existing biometric methodologies, their usage and limitations that are employed in real time cases. It
also presents the motivation for adapting biometrics in current situations. In addition to this, it also makes an
attempt to talk on the technical and security related issues towards biometric systems.
Keywords: - Biometrics, authentication, security, password, real time.