Ye Zhenjun was born in 1976. He received his M.S. and Ph.D. degrees at Tianjin University. His employment experience include the Department of Mathematics and Physics, North China Electric Power University. His special fields of interest include information security and cryptography. E-mail: yezhenjun76@sohu.com Fang Zhenming was born in 1976. He received his M.S. and Ph.D. degrees at Tianjin University. His research interest is risk control and algorithm. E-mail: fangzhenm@126.com Wang Chunfeng was born in 1966. He received his M.S. and Ph.D. degrees at Tianjin University. His employment experience included School of Management, Tianjin University. He is a professor and his specialfields of interest include system engineering and risk control.E-mail: cfwang@tju.edu.cn Meng Fanzhen was born in 1946. He is a professor at the School of Science, Tianjin University. His research interest is algorithm design and analysis. E-mail: mengfan@public.tpt.tj.cn