1. School of Info Technology, Deakin University, Melbourne, VIC, Australia
2. School of Cyber Engineering, Xidian University, Xi'an, Shaanxi, China
3. Shandong Computer Science Center (National Supercomputer Center in Jinan), Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
4. State Key Laboratory of Integrated Services Networks and the School of Telecommunications Engineering, Xidian University, Xi'an, Shaanxi, China
5. Department of Sciences and Informatics, Muroran Institute of Technology, Hokkaido, Japan