Abstract: Recently because of development of remote network technology, users are able to access the network freely without constraints of time and space. As users are getting more frequent to access the remote server in a computing environment, they are increasingly being exposed to various risk factors such as forward secrecy and server impersonation attack. Therefore, researches for remote user authentication scheme have been studying actively. This study overcomes the weaknesses of many authentication schemes proposed recently. This study suggests an improved authentication scheme that protects user’s anonymity with preserving variable more safe and also provides forward secrecy.