论文标题
对网络物理系统的跨层协调攻击：具有控制观测的LQG游戏框架
Cross-Layer Coordinated Attacks on Cyber-Physical Systems: A LQG Game Framework with Controlled Observations
论文作者
论文摘要
这项工作建立了一个游戏理论框架，以研究对网络物理系统（CPSS）的跨层协调攻击。攻击者可以干扰物理过程，并同时对通信渠道发动干扰攻击。同时，防守者可以通过分配观察结果来躲避堵塞。通用框架捕获了对CPSS的各种经典攻击模型。利用动态编程技术，我们完全表征了子游戏的完美平衡（SPE）控制策略。我们还得出了SPE观察和干扰策略，并提供有效的计算方法来计算它们。结果表明，物理和网络攻击是协调的，并且相互依赖。 一方面，控制策略是在状态估计中是线性的，并且阻塞攻击引起的估计错误将导致绩效降解。另一方面，攻击者与身体层中的防御者之间的相互作用显着影响观察和控制策略。数值示例说明了防御者与攻击者之间的相互作用，通过他们的观察和干扰策略。
This work establishes a game-theoretic framework to study cross-layer coordinated attacks on cyber-physical systems (CPSs). The attacker can interfere with the physical process and launch jamming attacks on the communication channels simultaneously. At the same time, the defender can dodge the jamming by dispensing with observations. The generic framework captures a wide variety of classic attack models on CPSs. Leveraging dynamic programming techniques, we fully characterize the Subgame Perfect Equilibrium (SPE) control strategies. We also derive the SPE observation and jamming strategies and provide efficient computational methods to compute them. The results demonstrate that the physical and cyber attacks are coordinated and depend on each other. On the one hand, the control strategies are linear in the state estimate, and the estimate error caused by jamming attacks will induce performance degradation. On the other hand, the interactions between the attacker and the defender in the physical layer significantly impact the observation and jamming strategies. Numerical examples illustrate the interactions between the defender and the attacker through their observation and jamming strategies.
