1. Science and Technology Laboratory of Parallel and Distributed Processing, College of Computer, National University of Defense Technology, Hunan, Changsha, China
2. School of Cyberspace Security, Beijing University of Posts and Telecommunications, Beijing, China
3. Fujian Key Laboratory of Sensing and Computing for Smart Cities, School of Informatics, Xiamen University, Xiamen, China
4. Department of Computer Science and Engineering, Hong Kong University of Science and Technology, Hong Kong, China
5. Department of Computer Architecture, Universitat Politécnica de Catalunya, Barcelona, Spain