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Hybrid attack monitor design to detect recurrent attacks in a class of cyber-physical systems

机译：混合攻击监视器设计可检测一类网络物理系统中的重复攻击

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In this paper, we study a security problem for attack detection in a class of cyber-physical systems consisting of discrete computerized components interacting with continuous agents. We consider an attacker that may inject recurring signals on both the physical dynamics of the agents and the discrete interactions. We model these attacks as additive unknown inputs with appropriate input signatures and timing characteristics. Using hybrid systems modeling tools, we design a novel hybrid attack monitor and, under reasonable assumptions, show that it is able to detect the considered class of recurrent attacks. Finally, we illustrate the general hybrid attack monitor using a specific finite time convergent observer and show its effectiveness on a simplified model of a cloud-connected network of autonomous vehicles.
机译：在本文中，我们研究了一类由分立的计算机化组件与连续代理交互组成的网络物理系统中的攻击检测安全问题。我们认为攻击者可能会在代理的物理动力学和离散交互上注入重复出现的信号。我们将这些攻击建模为具有适当输入签名和时序特征的累加未知输入。使用混合系统建模工具，我们设计了一种新颖的混合攻击监视器，并在合理的假设下，表明它能够检测出所考虑的周期性攻击类别。最后，我们说明了使用特定的有限时间会聚观测器的通用混合攻击监视器，并在自动驾驶云连接云的简化模型上显示了其有效性。

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