中文摘要：

Lu Xiaofeng, is currently a lecturer in Beijing University of Posts and Telecommunications. He received his Ph.D. degree in computer science from Beijing University of Aeronautics and Astronautics in 2010. During 2007 to 2008, he visited the Computer Laboratory of University of Cambridge. His re- search interests include DTN communication, network securi- ty, and anonymous communication, etc. Pan Hui, is a senior research scientist at the Telekom Innova- tion Laboratories （T-labs） and an adjunct Professor of social networking and computing at Aalto University （Helsinki Uni- versity of Technology）. He hold a Ph.D. degree from Com- puter Laboratory, University of Cambridge under the supervi- sion of Prof. Jon Crowcroft and partly in the Intel Research Cambridge. He received both Bachelor and Mphil from Uni- versity of Hong Kong. His research interests include DTN and social networks. Pietro Lio, is senior lecturer at the University of Cambridge, Computer Laboratory in England and fellow and director of Studies at FitzwiUiam College of University of Cambridge. His research interests include modeling biological processes on net- works, modeling stem cells, developing transcription and phy- logenetic applications on a grid environment. He is also inter- ested in bio-inspired design of wireless networks and epidemi- ological networks.