本文档包含一组所需的站点安全服务的规范，以确保源的真实性和可信实体之间交换的信息的完整性:-作为有界安全管理实体运行的设备，即ISO 21217中规定的“ITS车站通信单元”（ITS-SCU）和“ITS车站单元”（ITS-SU），以及-在其SUs（由一个或多个scu组成）和外部可信实体（如传感器和控制网络）之间。这些服务包括身份验证和安全会话建立，它们是以可信和安全的方式交换信息所必需的。这些服务对于许多ITS应用和服务都是必不可少的，包括时间关键型安全应用、自动驾驶、ITS站点的远程管理（ISO 24102-2[5]）和路边\/基础设施相关服务。

This document contains specifications for a set of ITS station security services required to ensure the authenticity of the source and integrity of information exchanged between trusted entities: — devices operated as bounded secured managed entities, i.e. "ITS Station Communication Units" (ITS-SCU) and "ITS station units" (ITS-SU) specified in ISO 21217, and — between ITS-SUs (composed of one or several ITS-SCUs) and external trusted entities such as sensor and control networks. These services include authentication and secure session establishment which are required to exchange information in a trusted and secure manner. These services are essential for many ITS applications and services including time-critical safety applications, automated driving, remote management of ITS stations (ISO 24102-2[5]), and roadside/infrastructure related services.