Design And Detection Of False Data Injection Attacks Against Networked Control Systems

Networked control systems(NCSs)are distributed control systems which connect controllers,actuators and sensors through a communication network,which have many advantages,such as remote and wide range control,easy installation and maintenance,strong mobility and so on.Due to the openness and insufficient protection of a communication network,especially a wireless network,data transmitted through the network are easy to be eavesdropped and even be destroyed by malicious attackers.Hence,this paper investigates the design,detection and analysis issues of false data injection(FDI)attacks against NCSs from the perspective of control security.The main works are as follows:(1)FDI attack sequences against NCSs are designed for the measurement data in the feedback channel and the control data in the forward channel,respectively,and a definition is given for the stealthiness of an attack,which can destroy the system performance and even make the system unstable without being detected by a residual distribution detector.Theoretical analysis and numerical simulation verify the effectiveness of the proposed attack sequences.(2)In order to successfully detect the two-channel stealthy FDI attacks mentioned above,a detection scheme based on active data modification is proposed.Based on the modified data,the attacker identifies system model parameter and then generates attack sequences.Both theoretical analysis and numerical simulation are carried out to evaluate the effectiveness of the proposed detection scheme for two cases: an attacker can accurately identify the system model parameters and an attacker cannot accurately identify the system model parameters.(3)An FDI attack is designed for partial sensor measurements of an NCS.Its stealthiness and effects on the closed-loop system performance are analyzed.Two conclusions are obtained by theoretical analysis and simulation verification: one is that the FDI attack against partial sensor measurements is no longer always stealthy;the other is that,whether an open-loop system is stable or unstable,the FDI attack may make the corresponding closed-loop system stable or unstable.(4)For a networked DC motor control system experimental platform,the experimental Simulink block diagrams are designed for the design and detection schemes of two-channel FDI attack,respectively,the effectiveness of which is further verified by the corresponding practical experiments.