Int. J. Security and Networks, Vol. 1, Nos. 3/4, 2006 Copyright © 2006 Inderscience Enterprises Ltd. 198 A self-encryption authentication protocol for teleconference services Yixin Jiang and Chuang Lin Department of Computer Science and Technology, Tsinghua University, Beijing, China E-mail: yxjiang@csnet1.cs.tsinghua.edu.cn E-mail: clin@csnet1.cs.tsinghua.edu.cn Minghui Shi and Xuemin Sherman Shen* Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario, Canada E-mail: mshi@bbcr.uwaterloo.ca E-mail: xshen@bbcr.uwaterloo.ca *Corresponding author Abstract: A novel authentication protocol for teleconference service is proposed. The main features of the proposed protocol include identity anonymity, one-time Pseudonym Identity (PID) renewal and location intracability. Identity anonymity is achieved by concealing the real identity of a mobile conferee in a prearranged PID. One-time PID Renewal mechanism, in which the mobile conferee’s PID is frequently updated communicating with the network centre, is introduced to offer location intracability. It is shown that the security has been significantly enhanced, while the computation complexity is similar to the existing ones appeared in the literature. Keywords: authentication; teleconference services; protocol; anonymity. Reference to this paper should be made as follows: Jiang, Y., Lin, C., Shi, M. and Shen, X.S. (2006) ‘A self-encryption authentication protocol for teleconference services’, Int. J. Security and Networks, Vol. 1, Nos. 3/4, pp.198–205. Biographical notes: Yixin Jiang received his MS in Computer Science from Huazhong University of Science and Technology in 2002. He is currently pursing his PhD at the Department of Computer Science and Technology, Tsinghua University, Beijing, China. His current research interests include network security. Chuang Lin is a Professor of Computer Science at the Tsinghua University, Beijing, China. He received his BS and PhD in Computer Science from Tsinghua University. Her current research focuses on performance evaluation, Petri nets, temporal logics and network security. Minghui Shi received a BS in 1996 from Shanghai Jiao Tong University, China and an MS in 2002 from the University of Waterloo, Ontario, Canada, both in electrical engineering. He is currently working towards a PhD at the University of Waterloo. His current research interests include wireless LAN/cellular network integration and network security. Xuemin Sherman Shen is a Professor of Electrical and Computer Engineering at the University of Waterloo, Ontario, Canada. He received his PhD in control from Rutgers University, USA. His research interests include wireless/internet interworking, radio resource and mobility management, voice over mobile IP, WLAN/WiMAX, WAP, UWB wireless communications, wireless ad hoc and sensor networks, wireless network security, stochastic process and optimal control and filtering. 1 Introduction Mobile teleconference is a synchronous collaboration session, in which conferees at remote locations cooperate with an interactive procedure, for example, a board meeting, a task force or a scientific symposium through wireless communications. When a conference chair holds a mobile teleconference, all conferees are required to connect to a centre node, called a Network Center (NC), via wireless access network. The NC receives messages