Abstract
Security will never go out of style. The most existing network applications authenticate users with an username/password system. Such systems using the reusable passwords are susceptible to attacks based on the theft of the password. To overcome the above susceptibility in the existing applications There exist an authentication mechanism known as Two factor Authentication (T-FA). Two factor authentication is a process used to authenticate or verify the identity of a person or other entity requesting access under security constraints. It is a system wherein two different factors are used in conjunction to authenticate. Using two factors as opposed to one factor generally delivers a higher level of authentication assurance. With One-time password (OTP) a factor makes it more difficult to gain unauthorized access to restricted resources, like a computer account, batik account etc. In this paper, we propose a new approach in implementing the two factor authentication with one of the factor as one time password key generation using mobile phones.