Institution: | 1. Zhengzhou Information Science and Technology Institute, Zhengzhou 450002, PR China;2. Science and Technology on Information Assurance Laboratory, Beijing 100072, PR China;3. School of Mathematical Sciences, Peking University, Beijing 100871, PR China;4. Institute of Mathematics and Software Science, Sichuan Normal University, Chengdu 610066, PR China;5. Department of Mathematical Sciences, Clemson University, SC 29634-0975, USA |