论文标题
安全分析和针对隐形重播攻击的故障检测
Security Analysis and Fault Detection Against Stealthy Replay Attacks
论文作者
论文摘要
本文研究了对控制系统的数据重播攻击的安全问题。假定攻击者在稳态情况下干扰控制系统过程。该问题作为攻击的标准方式提出，它正在存储测量结果，并将其在更多时间重新播放到系统中。假定控制器是LQG控制器。本文中的主要新颖性可以说是通过使用k-l差异方法来涵盖这些攻击和高阶动力学的更多一般控制系统问题，提出了不同的攻击检测标准。另外，在传输数据作为论文的另一个贡献时，也存在一个数据包抛弃功能。配方和数值模拟通过快速响应发生的攻击来证明新提出的攻击检测程序的有效性。尽管在以前的方法中，攻击检测延迟或LQG性能之间的权衡很大，但在这种方法中，证明这种权衡的差异在攻击发生的早期不考虑，因为攻击检测率很快，因此可以在第一刻使用拟议的攻击检测标准在第一刻内使用防御策略来停止这些攻击。
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.
