E-mail: jiangpengbanana@ 163.com,Peng Jiang received her BS in mathematics and applied mathematics from Southeast University, China in 2010. She is currently a PhD candidate in the Department of State Key Laboratory of Networking and Switch Technology, Beijing University of Posts and Telecommunications, China. Her research interests include information security and privacy concerns. Qiaoyan Wen received her BS and MS in mathematics from Shaanxi normal University, China, in 1981 and 1984, respectively, and her PhD in Cryptography from Xidian University, China in 1997. She is a professor of Beijing University of Posts and Telecommunications. Her research interests include coding theory, cryptography, information security, Internet security, and applied mathematics. Wenmin Li received the BS and MS in mathematics and applied mathematics from Shaanxi Normal University, China in 2004 and 2007, respectively, and her PhD in Cryptology from Beijing University of Posts and Telecommunications, China in 2012. She is currently a lecturer in Beijing University of Posts and Telecommunications,China. Her research interests include cryptography and information security. Zhengping Jin received his BS in mathematics and applied mathematics, and his MS in applied mathematics from Anhui Normal University, China in 2004 and 2007 respectively, and his PhD in Cryptography from Beijing University of Posts and Telecommunications, China in 2010. Now he is a lecturer of Beijing University of Posts andTelecommunications. His research interests include cryptography, information security, Internet security, and applied mathematics. Hua Zhang received her BS in telecommunications engineering in 1998, and her MS in cryptology in 2005, both from Xidian University, China and her PhD in cryptology from Beijing University of Posts and Telecommunications, China in 2008. Now she is an associate professor of Beijing University of Posts and Telecommunications. Her research interests include cryptography, information security, and network security