Research and Design of Subway BAS Intrusion Detection Expert System

The information security of urban rail transit system faces great challenges. As a subsystem of the subway, BAS is short for Building Automation System, which is used to monitor and manage subway equipment and environment, also facing the same problem. Based on the characteristics of BAS, this paper designed a targeted intrusion detection expert system. This paper focuses on the design of knowledge base and the inference engine of intrusion detection system based on expert system. This study laid the foundation for the research on information security of the entire rail transit system.

I. Introduction

As an important national infrastructure, urban rail transit is related to national security and national economy and the people's livelihood, which is an important support for many fields and industries. At present, the information security protection of urban rail transit is relatively backward, facing the following security problems: the structure is complex and some subsystems are connected to the Internet; Weak gateway protection between subnets; wireless communication is vulnerable with open frequency bands and protocols. In recent years, domestic and foreign urban rail traffic accidents have occurred many times, causing great adverse effects. For example, in March 2012, the wireless network of the station information release system and the operational scheduling system were attacked in Shanghai Shentong subway.