Active Interdiction Defence Scheme Against False Data-Injection Attacks: A Stackelberg Game Perspective.

Abstract

The security issue is of the fundamental importance for cyber-physical systems (CPSs) due to the vulnerability to cyber attacks. In this article, an active interdiction defence scheme is proposed as an extra safeguard against the strategic false data-injection (FDI) attacker. To tackle the coupling between the decision-making processes of the FDI attacker and the active interdiction defence scheme, a framework of dynamic Stackelberg game is formulated to characterize the hierarchical interaction due to their asymmetric information structures. Subsequently, the Stackelberg strategies of both players are constructed. Furthermore, a sufficient condition is derived to guarantee asymptotic stability of the closed-loop system with the FDI attack and the active interdiction defence scheme. Finally, two simulation examples are provided to illustrate the correctness and effectiveness of the proposed active interdiction defence scheme.