抗隐蔽重放攻击的安全性分析与故障检测
Security Analysis and Fault Detection Against Stealthy Replay Attacks
摘要：
研究了控制系统的数据重放攻击的安全问题。假设攻击者在稳态情况下干扰控制系统过程。这个问题被认为是标准的攻击方式，即存储测量结果并在以后的时间内将其重放到系统中。控制器被假定为LQG控制器。本文的主要创新之处可以说是提出了一个不同的攻击检测标准，通过使用K-L发散方法，以涵盖更一般的控制系统问题，这些攻击和高阶动态。另外，作为本文的另一个贡献，在数据传输中存在丢包特性。公式和数值模拟证明了新提出的攻击检测过程的有效性，具有快速响应发生的攻击。虽然，在以前的方法中，攻击检测延迟或LQG性能之间的权衡是显着的，在这种方法中，它被证明是不考虑这种权衡的差异在攻击发生的早期时刻，因为攻击检测率是快速的，因此，这些攻击可以停止与防御策略在第一时间与建议的攻击检测标准。
英文摘要：
This paper investigates the security issue of the data replay attacks on the control systems. The attacker is assumed to interfere with the control system process in a steady-state case. The problem is presented as the standard way to attack, which is storing measurements and replay ing them in further times to the system. The controller is assumed to be the LQG controller. The main novelty in this paper can be stated as proposing a different attack detection criterion by using the K-L divergence method to cover more general control system problems with these attacks and with higher-order dynamics. Also, there exists a packet-dropout feature in transmitting the data as another contribution of the paper. Formulations and numerical simulations prove the effectiveness of the newly proposed attack detection procedure by having a quick response to occurred attacks. Although, in previous approaches, the trade-off between attack detection delay or LQG performance was significant, in this approach it is proved that the difference in this trade-off is not considered in early moments when the attack happens since the attack detection rate is rapid and thus, these attacks can be stopped with defense strategies in the first moments with the proposed attack detection criterion.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
