An enhanced remote login authentication with smart card

Based on one-way hash function, Sun proposed an efficient remote login authentication protocol with smart card in 2000. However, in 2002, Chien at al. pointed out a deficiency of Sun´s scheme which only realized unilateral authentication and put forward an efficient and practical solution for remote mutual authentication scheme. But recently, Hsu discussed that this scheme was not secure enough since it was vulnerable to the parallel session attack again. In this paper, we give an enhanced remote login authentication with smart card, which inherits all the merits of the previous schemes as well as realizes secure mutual authentication without significantly increasing the computational cost.