New Anonymous User Identification and Key Establishment Protocol in Distributed Networks.

Recently, Wu and Hsu showed that Lee and Chang's anonymous user identification and key establishment protocol was insecure with regard to two attacks and proposed an improved protocol, called the WH protocol. In this paper, we show that the WH protocol is still vulnerable to an unknown-key share attack. Then, we propose an improved protocol to address this problem by applying a mutual authentication method. [ABSTRACT FROM AUTHOR]