结构化系统的执行器安全指标
Actuator Security Index for Structured Systems
摘要：
给定一个具有易受攻击的执行器（和传感器）的网络，执行器的安全指数等于需要妥协的传感器和执行器的最小数量，以便使用所述执行器进行完全不可检测的攻击。研究离散时间LTI网络系统执行器安全指标的计算问题。首先，我们表明，在一个结构化的系统框架下，执行器的安全指标是通用的。此后，我们提供了图论条件计算的结构执行器安全指数。所述条件是根据适当定义的有向（子）图上的链接的存在。基于这些条件，我们提出了一个算法计算的结构指数。
英文摘要：
Given a network with the set of vulnerable actuators (and sensors), the security index of an actuator equals the minimum number of sensors and actuators that needs to be compromised so as to conduct a perfectly undetectable attack using the said actuator. This paper deals with the problem of computing actuator security indices for discrete-time LTI network systems. Firstly, we show that, under a structured systems framework, the actuator security index is generic. Thereafter, we provide graph-theoretic conditions for computing the structural actuator security index. The said conditions are in terms of existence of linkings on appropriately-defined directed (sub)graphs. Based on these conditions, we present an algorithm for computing the structural index.
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