Xiangguo Cheng
School of Information Engineering, Qingdao University, Qingdao
China

Xiangguo Cheng, received his B.S. degree in Mathematics Science from Jilin University in 1992,his M.S.degree in Applied Mathematics Science from Tongji University in 1998 and his Ph.D. degree in State Key Laboratory of Integrated Services Network of Xidian University in 2006. He is currently an associate professor in the College of Information Engineering of Qingdao University. His research interests are in the areas of computer security, public key cryptosystems and their applications.

Chen Yang
China Electronics Standardization Institute, Beijing
China

Chen Yang, received his Ph.D. degree in State Key Laboratory of Integrated Services Network of Xidian University in 2008. He is currently an engineer  in China Electronics Standardization Institute.

Jia Yu
School of Information Engineering, Qingdao University, Qingdao
China

Jia Yu received the M.S. and B.S. degrees in School of Computer Science and Technology from Shandong University, China, in 2000 and 2003, respectively. He received Ph. D. degree in Institute of Network Security from Shandong University, China, in 2006. He is currently an associate professor in the College of Information Engineering at Qingdao University, China. His research interests include key evolving cryptography, digital signature, cryptographic protocol and network security.