Key Laboratory of Network Security and Cryptology, Fujian Normal University, Fuzhou 350108, P.R.China;
Key Laboratory of Network Security and Cryptology, Fujian Normal University, Fuzhou 350108, P.R.China;
Key Laboratory of Network Security and Cryptology, Fujian Normal University, Fuzhou 350108, P.R.China;
Key Laboratory of Network Security and Cryptology, Fujian Normal University, Fuzhou 350108, P.R.China;