1. Engineering Research Center of Digital Forensics of Ministry of Education, and the School of Computer Science, Nanjing University of Information Science and Technology, Nanjing, China
2. School of Computer and Information, Anhui Normal University, Wuhu, China
3. School of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou, China
4. School of Computer Science and Engineering, Nanjing University of Science and Technology, Nanjing, China