1. School of Computer Science and Engineering; Hunan University of Science and Technology; Xiangtan China
2. Hunan Provincial Key Laboratory of Network Investigational Technology; Hunan Police Academy; Changsha China
3. Institute for Cyber Security, School of Computer Science and Engineering; University of Electronic Science and Technology of China; Chengdu China
4. Department of Mathematics; Motilal Nehru National Institute of Technology Allahabad; Prayagraj India
5. Department of Computer Science and Engineering; Xiamen Institute of Technology; Xiamen China