Date Added: Nov 2012
This paper aims to provide mutual authentication of remote unit and remote server side. It uses cryptanalysis process of two user authentication protocols i.e. remote unit which is represented by microcontroller and remote server which is represented by personal computer. It consists of registration, login, verification phase in remote server side and login and verification phase for remote unit side. In the registration phase, it explains how the user password is encrypted and stored in the smart card .In the login phase, it explains how request message send to remote server and use the response message from remote server for authenticating user.