Institution: | 1. Concord University College, Fujian Normal University, Fuzhou, Fujian, 350117 PR China;2. College of Mathematics and Informatics, Fujian Normal University, Fuzhou, Fujian, 350117 PR China;3. Fujian Provincial Key Laboratory of Network Security and Cryptology, Fujian Normal University, Fuzhou, Fujian, 350007 PR China |