文献类型：期刊文献

英文题名：Security Analysis of a Distributed Networked System Under Eavesdropping Attacks

作者：Yang, Wen[1];Zheng, Ziqian[1];Chen, Guanrong[2];Tang, Yang[1];Wang, Xiaofan[3]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Control & Optimizat Chem Proc, Shanghai 200237, Peoples R China;[2]City Univ Hong Kong, Dept Elect Engn, Hong Kong, Peoples R China;[3]Shanghai Univ, Sch Mech Engn & Automat, Shanghai 200072, Peoples R China

年份：2020

卷号：67

期号：7

起止页码：1254

外文期刊名：IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS

收录：;EI(收录号：20202808910640);WOS:【SCI-EXPANDED(收录号:WOS:000543961700018)】；

基金：This work was supported in part by the National Natural Science Foundation of China under Grant 61573143, Grant 61773255, and Grant 61673176, in part by the Projects Sponsored by the Development Fund for Shanghai Talents, in part by the Shanghai Natural Science Foundation under Grant 18ZR1409700, and in part by the Programme of Introducing Talents of Discipline to Universities (the 111 Project) under Grant B17017. This brief was recommended by Associate Editor J. Wu.

语种：英文

外文关键词：Networked system; eavesdropping attack; observability; complex network; cyber-physical system

摘要：In this brief, we consider the security problem for a network of linear time-invariant dynamical systems under eavesdropping attacks, where an eavesdropper can measure the states of some nodes in the network. We provide a necessary and sufficient condition for the eavesdropper to reveal the states of the networked system. We also present some necessary conditions for the case when the network has tail nodes or at least one node not monitored by the eavesdropper. In addition, we investigate several typical network structures and show that the networked system can be completely observed provided that the eavesdropper can monitor one node in each cycle. Further, we characterize the minimal set of necessarily monitored nodes with the upper bound set of such nodes. Finally, we verify the theoretical results by numerical simulations.