1. Hubei Key Laboratory of Distributed System Security, Hubei Engineering Research Center on Big Data Security, School of Cyber Science and Engineering, Huazhong University of Science and Technology, Wuhan, China
2. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
3. Futurepath Technology (Wuhan) Co. Ltd., Wuhan, China
4. Morgan State University, Baltimore, MD, USA
5. Department of Electrical and Computer Engineering and the Institute for Systems Research, University of Maryland, College Park, MD, USA