列车通信网络WTB链路层攻击方法研究

Analysis of a method for attacking WTB link layers in a train communication network

列车通信网络(TCN)是列车专用的工业控制网络,其安全问题是列车运营的重中之重。目前尚缺乏直接针对TCN底层的安全监控手段。WTB是TCN标准体系中规定的一种底层总线通信模块。该文通过分析WTB的网络通信协议,发现了一种存在于列车通信网络底层的安全隐患以及可能的攻击方法。采用形式化建模验证和真实平台实验两种方式确认了攻击的有效性。此外,该文还根据攻击的特点,提出了相应的防范方法。

Train communication network （TCN） is a specialized industrial control network, whose safety and security problems are of great importance. The wire train bus （WTB） is one of the link layer communication modules of TCN architectures. A potential risk and a possible attack method were found based on the analysis of WTB communication protocol Formal modeling verification and experiments show that the attack method is feasible. Based on the characteristics of the attack method, this paper also proposes a precautionary method.