International Journal of Computer Applications
Computer Security System/technology has passed through several changes. The trends have been from what the people know (e.g. password, PIN, etc) to what they have (ATM card, Driving License, etc) and presently to who they are (Biometry) or combinations of two or more of the trios. This technology (biometry) has come to solve the problems identified with knowledge-based and token-based authentication systems. It is possible to forget their password and what they have can as well be stolen. The security of determining who they are is referred to as BIOMETRIC. Biometric, in a nutshell, is the use of their body as password. This paper explores the various methods of biometric identification that have evolved over the years and the features used for each modality.