Abstract: According to the requirements for regional boundary security of classified protection systems and the three elements of information security, this paper establishes an evaluation model of regional boundary information security of railway signal systems, calculates the weight of the lower matrix by using analytic hierarchy process, and concludes that the railway signal systems should adopt applicable information security technology in four areas, namely boundary protection, access control, intrusion prevention and wireless usage control, in order to focus on the protection of equipment in safety data network, centralized traffic control network and signal monitoring network, and the protection of radio block center and on-board equipment.

Key words: classified protection, analytic hierarchy process, railway signal system

摘要： 根据等级保护制度区域边界安全要求和信息安全三要素建立铁路信号系统区域边界信息安全评估模型，使用层次分析法计算下层矩阵权重，得出铁路信号系统应该在边界防护、访问控制、入侵防范和无线使用控制4方面使用相应信息安全防护技术对安全数据网、调度集中网、信号监测网中设备以及无线闭塞中心和车载设备进行重点防护。

关键词: 等级保护, 层次分析法, 铁路信号系统