Improved id-based remote user authentication scheme using smart card

Because of non-stop applications´ growth of network environment, making communications in such ambiance security is very important. Recently, Ashok Kumar Das has proposed a scheme to recover some pitfalls in Li et al.´s scheme. Das´s protocol also utilizes biometrics and random value instead of time - stamp. Besides, storing temporary nonce to withstand replay attack is an inherited aspect of this scheme. However, in this paper, we show Das´s scheme has many problems. To isolate them, we suggested a new design. Our scheme not only saves computational cost but also enhances security for transactions in insecure network channel.