earticle

영어

Anonymous user authentication schemes are essential to guarantee personal privacy in global mobility networks. Recently, Chung, Lee and Won proposed an improved authentication scheme with anonymity which remedies security weaknesses showed by Youn, Park and Lim. However, their improved scheme does not provide unlinkability. In this paper, we propose an anonymous authentication scheme which ensures user unlinkability. It is impossible for attackers to know particular sessions, that have already occurred several times, are originated from one same user. Moreover, we decrease the rounds of transmission among involved entities while consuming same computational power compared with previous schemes. Therefore, the proposed scheme is lightweight and suitable for the mobility networks.