1. College of Cyber Security, Jinan University, 47885 Guangzhou, Guangdong, China, (e-mail: xia_zhihua@163.com)
2. School of computer and software, Nanjing University of Information Science and Technology, 71127 Nanjing, Jiangsu, China, (e-mail: 634337549@qq.com)
3. School of computer and software, Nanjing University of Information Science and Technology, 71127 Nanjing, Jiangsu, China, (e-mail: apurance@gmail.com)
4. School of computer and software, Nanjing University of Information Science and Technology, 71127 Nanjing, Jiangsu, China, (e-mail: xionglz@nuist.edu.cn)
5. Department of Computer Science, Jinan University, Tianhe, GuangZhou, China, 510632 (e-mail: cryptjweng@gmail.com)
6. Dept of CS, Colorado Technical University, colorado Springs, Colorado, United States, (e-mail: xiongnaixue@gmail.com)