1. Key Laboratory of Analytical Mathematics and Applications (Ministry of Education) and Fujian Provincial Key Laboratory of Network Security and Cryptology, College of Computer and Cyber Security, Fujian Normal University, Fuzhou, China
2. School of Cyber Science and Engineering, Wuhan University, Wuhan, China
3. College of Cyber Security, Jinan University, Guangzhou, China
4. School of Information Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, China