Abstract: An Efficient User Authentication Scheme for Wireless Communications

In 2011, Li and Lee proposed a novel user authentication scheme with anonymity for wireless communications. In particular, Li and Lee defined two more session keys and adopted Diffie-Hellman key agreement method for their scheme to establish two more session keys. However, since modular exponential computation demands plenty of resources, their scheme is very inefficient. Thus, in this paper, we address the drawbacks of Li and Lee's scheme and propose an efficient user authentication scheme for wireless communications with same functionality and security.