State Key Laboratory of Networking and Switching Technology;
Beijing University of Posts and Telecommunications;
Beijing 100876;
China;
Global Energy Interconnection Research Institute;
Nanjing 210003;
China;
Information Security Center;
Beijing University of Posts and Telecommunications;
Beijing 100876;
China;
Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science and Technology Nanjing 210044;
China;