ABSTRACT
Cyber-physical system (CPS) refers to the next generation of an engineered system that requires tight integration of cyber world and the man-made physical world to achieve stability, security, reliability, robustness, and efficiency in the system. Emerging software-defined networking (SDN) can be integrated as the communication infrastructure with the critical physical infrastructure like smart power grid to accomplish such a system. This Chapter gives an overview of SDN, smart grid and SDN-based smart grid. SDN can provide security against various types of attacks by providing consistent access control, applying efficient and effective security policies, and managing and controlling the network through the use of a centralized SDN controller. Thus, it has security advantages due to its design nature. However, SDN does suffer from security shortcomings too as all the layers in SDN architecture are vulnerable to attacks. In the line of this, the chapter discusses various types of attacks related to SDN architecture and their countermeasures. It also demonstrates the applicability of SDN to provide security in smart grids. Finally, the Chapter categorizes different types of attacks and their countermeasures related to SDN based smart grids.
