Secure process control system of industrial networks

Recently there are more cyber-attacks in industrial networks. Stuxnet, the worm that attacked Iran nuclear power station highlights the traditional cyber threat in modern industrial infrastructures. Current process control systems (PCS) are vulnerable to cyber-attacks due to lack of means of verifying the legitimacy of control code and monitoring changes of controller devices. This paper proposed a secure, scalable, deployable architecture for PCS. A HMAC-based digital signature method was proposed to realize control code verification, and two active/passive schemes were proposed to monitor controller devices. At the end of this paper, we also analyzed the performance implications of proposed measures.