CBTC系统数据传输安全分析

Security Analysis of Data Transmission of CBTC System

研究基于通信的列车控制系统数据传输的安全性。首先建立了系统安全架构,并按照不同的硬件分布层级,划分并定义了板间、子架间和柜间通信3级传输;然后针对各个层级的传输,以以太网及CAN总线通信为例,识别并分析了各层故障模式及对传输系统的安全影响,并定义了相应的安全需求。该研究对信号系统的通信设计及安全评估具有一定的借鉴和指导意义。

This paper makes a study on the security of data transmission of the communication based train control system.Firstly,the architecture of system security is established and three levels of transmission are defined to according to the location of hardware components:board level,subrack level and cabinet level.Taking Ethernet and CAN bus as examples,the failure modes of each level of transmission and their impacts on system security are identified and analyzed and relevant security requirements can be defined.This study can provide certain reference and guidance for the design and safety assessment of signaling system.