| Institution: | Department of Mathematics and Physics, Nanjing Institute of Technology, Nanjing 211167, China; State Key Laboratory of Cryptology, P. O. Box 5159, Beijing 100878, China.;Corresponding author. Department of Mathematics, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China; State Key Laboratory of Cryptology, P. O. Box 5159, Beijing 100878,China.; School of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing 210023,China; Shanghai Key Laboratory of Trustworthy Computing, East China Normal University, Shanghai 200062, China. |
