Secure Mechanism of Intelligent Urban Railway Cloud Platform Based on Zero-trust Security Architecture

Aiming to strengthen the stability of operation and maintenance of the urban rail transit network cloud platform at this stage, it is emerging to solve the security mechanism of the intelligent urban railway cloud platform. In this paper, we proposed a zero-trust network security solution for the rail transit system network construction. First, we built a zero-trust network construction for smart city rail transit at the architecture level, it can break the phenomenon of information security silo of rail transit line platform and minimize the system security risk based on a zero-trust network. Next, we focus on building a cloud security brain for urban rail transit networks and proposed the self-learning trust algorithm for a zero-trust network. Specifically, we illustrated the modified network model and constructed a dynamic updating user trust profile as the trustworthy access list. The parameters of the self-learning trust algorithm consist of the state, available chain road bandwidth, waiting for queue state of network traffic, linkage actions, and so on. We adopted a dynamic self-learning strategy for adjusting mitigation policy, the learning step predicted the state of the predetermined congestion and selected the rich links for execution. Finally, experiments show the efficiency of our secure mechanism of railway cloud platform based on zero-trust security architecture.