1. School of Computer Science and Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, China
2. Department of Computer Science and Information Engineering (CSIE), Providence University, Taichung, Taiwan
3. School of Computer Science and Engineering, Institute for Cyber Security, University of Electronic Science and Technology of China, Chengdu, Sichuan, China
4. School of Computer Science and Engineering, Central South University, Changsha, Hunan, China
5. Centre for Distributed and High-Performance Computing, The University of Sydney, Sydney, NSW, Australia