ABSTRACT
Recent years have witnessed the migration from proprietary standards for communications towards open international standards for modern critical infrastructures. Arming the control systems with modern information technology leads to low maintenance costs and increased system flexibility [183]. However, the growing trend of integrating the control system with new information technologies exposes it to cyber attacks [41, 94]. Among various types of attacks, the DoS attack, which usually leads to congestion in the communication channel, has been listed as the most financially expensive security incident [21]. It has been reported in [62] and [37] that a number of critical infrastructures were compromised by DoS attacks. To circumvent these newly emerged problems, the concept of resilient control has been recently proposed in [115], which emphasizes controller design in an adversary cyber environment. Recently, a number of literatures have addressed the security of control systems with respect to various types of attacks. The coupled design between the cyber and physical parts of the system leads to a system-level resilient design of the CPS.
