Jiang Qi, received the B.S. degree from Shaanxi Nolrml University, China in 2005 and Ph.D. degree from Xidian University, China in 2011. He is now with the School of Computer Science and Technology, Xidian University. His research interests include security protocols and wireless network security, etc. Email: jiangqixdu @ grmil.com Ma Zhuo, received the B.S. degree from Xidian University, China in 2003 and Ph.D. degree from Xidian University in 2010. He is now with the School of Computer Science and Technology, Xidian Univelsity. His research interests include trusted computhlg and wireless network seculity, etc. Ma Jianfeng, received the B.S. degree li-om Shaanxi Nomral University, China in 1982, and M. S. degree from Xidian University, in 1992, and the Ph.D. degree fiom Xidian Univemity in 1995. Currently he is a Professor of the School of Computer Science and Technology, Xidian University. His research haterests inchidc information security, cryptography and network security. Li Guangsong, received the B.S. and M.S. degrees from Information Engineering University, China in 1999 and 2002 respectirely, and the Ph.D. degree from Infromation Science and Technology Institute, China in 2005. Now he is an associate profcssor of lnfom-,ation Science and Technology Institute. rent interests include mobile coirlnunication, wireless and digital rights magement. His cursecurity