Abstract
With the fast development of the Internet technology, there is an exponential growth in wireless networks-enabled applications across the globe. To ensure secure communication among all such applications, the authentication with key agreement has received maximum attention in recent times. Recently, Li et al. proposed an authentication with key agreement scheme using elliptic curve cryptosystem (ECC) for wireless mobile communications and claimed that their scheme could withstand different kinds of attacks. However, we find that their scheme cannot withstand various existing attacks. Also, their scheme suffers from the inefficiency of multiple secret keys. To improve security and performance, we propose a security-enhanced authentication with key agreement scheme using ECC for wireless mobile communications. Our analysis shows that the proposed scheme not only solves the security problems in Li et al.'s scheme, but also has better performance with respect to various selected metrics.