信息物理系统
计算机科学
国家(计算机科学)
估计
计算机安全
实时计算
工程类
系统工程
操作系统
算法
作者
Fuyi Qu,Nachuan Yang,Hao Liu,Yuzhe Li,Daniel E. Quevedo
出处
期刊:IEEE Transactions on Control of Network Systems
[Institute of Electrical and Electronics Engineers]
日期:2024-01-01
卷期号:: 1-12
标识
DOI:10.1109/tcns.2023.3285866
摘要
In this paper, we consider the security of remote state estimation in cyber-physical systems, where a wireless sensor sends the measurement of the considered system to a remote state estimator using a wireless channel. In this scenario, time-stamp technology is commonly used to record the time characteristic of the data for different objectives, such as realizing time synchronization and dealing with time delays. We consider a potential threat to this mechanism, and investigate a time-stamp attack, where a malicious adversary manipulates data packets to degrade the estimation performance of the remote estimator. In particular, we assume that the attacker can alter the time-stamps of any two packets. We consider two types of sensor transmission, namely innovation and local estimate, respectively, and analyze the evolution of the remote estimation error covariance for both cases. Furthermore, we characterize the optimal attack strategy that maximizes the estimation error covariance from the attacker's point of view. Finally, we present numerical simulations to demonstrate the effectiveness of our results.
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