1. School of Computer and Cyberspace Security, Fujian Normal University, Fuzhou, China
2. Department of Information Engineering, Fuzhou Polytechnic, Fuzhou, China
3. Department of Computer Science and Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan
4. College of Computer and Data Science, Minjiang University, Fuzhou, China
5. School of Mathematics, Physics and Computing, University of Southern Queensland, Toowoomba, QLD, Australia