Yeung Siu Fung   is a Ph.D. candidate at the Chinese University of Hong Kong. He received his B.Eng. and M.Phil. degree in the Computer Science and Engineering Department from the Chinese University of Hong Kong. His research are in multimedia technologies, particularly network security and transport protocols. His personal interests include sports and Christian music.

John C. S. Lui   received his Ph.D. in Computer Science from UCLA. After his graduation, he joined the IBM Almaden Research Laboratory/San Jose Laboratory and participated in various research and development projects on file systems and parallel I/O architectures. He later joined the Department of Computer Science and Engineering at the Chinese University of Hong Kong. His research interests encompass both systems and theory. His current research interests include theoretic/applied topics in data networks, distributed multimedia systems, network security, OS design issues, mathematical optimization and performance evaluation. John received the CUHK Vice-Chancellor’s Exemplary Teaching Award in 2001. He is an Associate Editor of the Performance Evaluation Journal, a member of the ACM, a senior member of the IEEE and an elected member of the IFIP WG 7.3. His personal interests include films and general reading.