A security enhancement model based on switching edge strategy in interdependent heterogeneous cyber-physical systems

With the advent of cross-domain interconnection, large-scale sensor network systems such as smart grids, smart homes, and intelligent transportation have emerged. These complex network systems often have a CPS (Cyber-Physical System) architecture and are usually composed of multiple interdependent systems. Minimal faults between interdependent networks may cause serious cascading failures between the entire system. Therefore, in this paper, we will explore the robustness detection schemes for interdependent networks. Firstly, by calculating the largest giant connected component in the entire system, the security of interdependent network systems under different attack models is analyzed. Secondly, a comparative analysis of the cascade failure mechanism between interdependent networks under the edge enhancement strategy is carried out. Finally, the simulation results verify the impact of system reliability under different handover edge strategies and show how to choose a better handover strategy to enhance its robustness. The further research work in this paper can also help design how to reduce the interdependence between systems, thereby further optimizing the interdependent network system's structure to provide practical support for reducing the cascading failures. In the later work, we hope to explore our proposed strategies in the network model of real-world or close to real networks.