天基列控系统网络安全风险分析OA

The space-based train control system combines low-orbit satellite Internet with train control system,simplifying the deployment and improving the disaster resistance capability of but introducing new cybersecurity threats to the train control system.To effectively prevent the cybersecurity issues faced by the space-based train control system,this paper employs the STPA-Sec security analysis framework to conduct a cybersecurity risk analysis.The control loop is established to identify unsafe control actions and causal scenarios.The cybersecurity risk analysis results are considered to propose feasible risk mitigation measures for the space-based train control system.The cybersecurity protection design is presented for two key scenarios,i.e.,communication confidentiality and integrity protection of the vehicle-ground satellite communication network of the space-based train control system,and trusted program execution of the train control and maintenance equipment.The research findings indicate that cybersecurity risk analysis and risk mitigation measures can provide effective cybersecurity guarantee for the space-based train control system,thereby providing theoretical and technical reference for the design of a cybersecurity protection scheme for the space-based train control system.