Design Of An Intrusion Detection System For Urban Rail Transit Industrial Control System

As urban population continues to grow,Urban Rail Transit System,a main means of transportation,has becoming gradually significant.The safe operation of Urban Rail Transit System is guaranteed by Urban Rail Transit Industrial Control System,which directly affects people's life and property security.The information security of Urban Rail Transit Industrial Control System has aroused increasingly more attention and become an inportant issue for research as safety accidents occur from time to time.Based on the situation of Urban Rail Transit Industrial Control System information security,this thesis analyses all the possible intrusions of Urban Rail Transit Industrial Control System,and designs an intrusion detection system accordingly.The main content of this thesis includes four parts.(1)This thesis summarized the information security issues faced by Urban Rail Transit Industrial Control System based on the security needs,framework,weakness and intrusion patterns of Urban Rail Transit System,and analyzed the weakness of Modbus/TCP industrial protocol,which is the main communication protocol used in Urban Rail Transit System.(2)As a result,all the possible intrusion patterns were concluded and the Snort Rules(applied in intrusion detection)were correspondingly designed.(3)A detailed introduction to the software and tools,which were used to design this intrusion detection system of Urban Rail Transit Industrial Control System,was given before the system was realized using Modbus protocol.(4)Finally,an integrated test platform was built using white-box testing method to verify the availability of this designed system and the rules.According to the test result,the designed Urban Rail Transit Industrial Control System intrusion detection system fulfilled the expectations,i.e.,it can capture intrusion packets and display the intrusion information on web pages dynamically.Besides,the designed Snort Rules is effective in intrusion detection.This system laid a solid foundation for the safe operation of Urban Rail Transit System.There are 29 pictures,8 tables and 42 references in this thesis.