Two-Way Coding and Attack Decoupling in Control Systems Under Injection Attacks
This addresses security vulnerabilities in control systems for applications like industrial automation, though it appears incremental by adapting communication theory concepts.
The paper tackles the problem of injection attacks in feedback control systems by introducing two-way coding and attack decoupling, resulting in a co-designed controller that nullifies the attack effect to zero in both transient and steady states.
In this paper, we introduce the concept of two-way coding, which originates in communication theory characterizing coding schemes for two-way channels, into control theory, particularly to facilitate the analysis and design of feedback control systems under injection attacks. Moreover, we propose the notion of attack decoupling, and show how the controller and the two-way coding can be co-designed to nullify the transfer function from attack to plant, rendering the attack effect zero both in transient phase and in steady state.