1. Hubei Engineering Research Center on Big Data Security, Key Laboratory of Distributed System Security of Hubei Province, School of Cyber Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
2. School of Software and the Key Laboratory for Ubiquitous Network and Service Software of Liaoning Province, Dalian University of Technology, Dalian, China
3. Intelligent and Distributed Computing Laboratory, School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan, China
4. Department of Computer Science, City University of Hong Kong, Kowloon Tong, Hong Kong