1. College of Computer Science and Technology, Xi’an University of Science and Technology, Xi’an, China
2. Institute of Cybersecurity and Cryptology, School of Computing and Information Technology, University of Wollongong, Wollongong, NSW, Australia
3. School of computing and information systems, Singapore Management University, Singapore
4. School of Cyberspace, Hangzhou Dianzi University, Hangzhou, China
5. School of Mathematics and Statistics, Lanzhou University, Lanzhou, China