基于协同交互型观测器的虚假数据注入攻击信号重构方法

doi:10.12382/bgxb.2023.0169

摘要/Abstract

摘要：

针对信息物理系统中传感器和执行器虚假数据注入攻击现象,利用观测器技术研究对该攻击信号的重构问题。由于防守者难以直接利用攻击信号的估计误差,导致难以准确估计攻击信号,借助系统输入输出数据建立包含攻击估计误差信息的虚拟辅助系统,利用协同交互策略构建一类协同交互型观测器,该观测器通过与虚拟辅助系统间的协同交互,利用攻击信号的估计误差信息来提高攻击信号的重构精度,获得更加准确的攻击信号。利用李雅普诺夫方法证明了重构的攻击信号收敛于真实攻击信号周围的紧集内。通过数值仿真验证了新方法的有效性。

关键词: 信息物理系统, 虚假数据注入攻击, 攻击重构, 协同交互型观测器

Abstract:

For the false data injection attacks against sensor and actuator in cyber-physical systems, the reconstruction problem of the attack signals is studied by using the observer technique. It is difficult for a defender to directly use the estimation errors of the attack signals. As a result, more accurately reconstructed attack signals are obtained hardly. Therefore, a virtual auxiliary system containing the information of the estimated errors of attack signals is established with the help of the system input and output data, and then a cooperative interaction observer is constructed by using the cooperative interaction strategy. Through the cooperative interaction with the virtual auxiliary system, the observer uses the information of the estimated errors of attack signals to improve the reconstruction accuracy of the attack signals and obtains more accurate attack signals. It is proven by Lyapunov approach that the reconstructed attack signals can converge to a small set around real attack signals. Then, the effectiveness of the new scheme is demonstrated through numerical simulation.

Key words: cyber-physical system, false data injection attack, attack reconstruction, cooperative interaction observer

中图分类号:

TP273

黄鑫, 畅晨旭, 李小杭, 苏庆宇. 基于协同交互型观测器的虚假数据注入攻击信号重构方法[J]. 兵工学报, 2023, 44(11): 3359-3368.

HUANG Xin, CHANG Chenxu, LI Xiaohang, SU Qingyu. An Approach for Reconstructing False Data Injection Attack Signal Based on Cooperative Interaction Observer[J]. Acta Armamentarii, 2023, 44(11): 3359-3368.

图/表 8

图1 数据注入攻击下的CPS

Fig.1 CPS under data injection attacks

图2 系统式(12)和虚拟辅助系统式(9)和式(10)间的协同交互设计框架

Fig.2 Design framework of cooperative interaction among system (12) and virtual systems (9) and (10)

图3 执行器攻击信号和文献[18]中观测器重构信号

Fig.3 Actuator attack and the reconstruction signal of observer in Ref.[18]

图4 执行器攻击信号和文献[19]中观测器重构信号

Fig.4 Actuator attack and the reconstruction signal of observer in Ref. [19]

图5 执行器攻击信号和协同交互型观测器重构信号

Fig.5 Actuator attack and reconstructed signal of cooperative interaction observer

图6 传感器攻击信号和文献[18]中观测器重构信号

Fig.6 Sensor attack and reconstructed signal of observer in Ref. [18]

图7 传感器攻击信号和文献[19]中观测器重构信号

Fig.7 Sensor attack and reconstructed signal of observer in Ref. [19]

图8 传感器攻击信号和协同交互型观测器重构信号

Fig.8 Sensor attack and reconstructed signal of cooperative interaction observer

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