Design And Implementation Of Tos Security System

Tricolor Operating Status (TOS) system shows the real-time operating status of the Shanghai metro network in three colors (Red, Yellow and Green) to the metro staff and the passenger. TOS supervises the density of passenger and the operating status of the pre-defined position. TOS contains three important sub-systems—collection system, analysis system and distribution system. This article is the foundational design and research to meet the requirement, especially for the system security.There are three parts in this paper.The first part is the introduction. It will introduce the background of this project, the structure of the whole article, and the achievement.The second part is the main body. It includes chapter 2 to chapter 6. Firstly it introduces the TOS System Briefly, including construction object, function requirement and existing conditions. Secondly it shows the system design proposal and the application case in shanghai Metro. Thirdly it analyses system security threat and related system security design.Forthly it introduces the security application,including network topology, security function,test proposal and user report. At last , summarizes the whole security system design and forecast.The third part is the summary. Basing on the second part, it gives the conclusion.