Abstract: Integrated Supervisory and Control System (ISCS) is one of the necessary automatic systems for efficient and safe operation of urban rail transit automation. The integrated monitoring system is a largescale integrated system with high integration of informationization and automation. The system integrates multiple automation and information subsystems in urban rail transit stations, tunnels, depots, parking lots, control centers, etc, and performs unified monitoring, control and management of subsystems on the same software platform, realizing the information sharing of each specialty system and the linkage control function between the systems. In this paper, the ISCS security protection solution for rail transit under the requirement of high realtime performance is studied, the typical security protection design concept is given, and the equal guarantee evaluation method is put forward.

Key words: rail transit, integrated supervisory and control system, integrated supervisory and control system (ISCS), network security, network security classified protection

摘要： 城市轨道交通综合监控系统(integrated supervisory and control system, ISCS)是城市轨道交通自动化高效、安全运行的必备自动系统之一，综合监控系统是信息化和自动化高度融合的大型集成系统.该系统集成了城市轨道交通车站、隧道、车辆段、停车场、控制中心等区域内的多个自动化、信息化子系统，并在同一软件平台上对各子系统进行统一监视、控制、管理，实现各自动化和信息化系统的数据共享、信息互通、系统联动控制等功能.对高实时性要求下的城市轨道交通ISCS安全防护方案进行了研究，给出了典型的安全防护设计方案，并提出了等保测评的方法.

关键词: 轨道交通, 综合监控系统, ISCS, 网络安全, 网络安全等级保护