This paper investigates the problem of interval estimation for cyber-physical systems subject to stealthy deception attacks. The cyber-physical system is supposed to be compromised by malicious attackers and on the basis of that, a stealthy attack strategy is formulated. Moreover, the stealthiness of the attack strategy against χ2\chi ^{2}-detector is analyzed. To accomplish interval estimation, the interval observer is designed by the monotone system method. Then, a novel method which combines reachable set analysis with H∞H_{\infty } technique is proposed. Theoretical comparison between the monotone system method and the proposed method is presented and it shows that the proposed method is able to improve the estimation accuracy. Finally, two illustrative examples are provided to demonstrate the superiority and effectiveness of the improved method.

中文翻译：

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隐秘欺骗攻击下信息物理系统改进的间隔估计方法


本文研究了遭受隐形欺骗攻击的网络物理系统的区间估计问题。假设信息物理系统会受到恶意攻击者的破坏，并在此基础上制定隐身攻击策略。此外，还分析了针对χ2\chi ^{2}-探测器的攻击策略的隐秘性。为了完成区间估计，采用单调系统方法设计了区间观测器。然后，提出了一种将可达集分析与 H∞H_{\infty } 技术相结合的新方法。对单调系统方法与本文提出的方法进行了理论比较，结果表明本文提出的方法能够提高估计精度。最后，提供两个说明性例子来证明改进方法的优越性和有效性。