ISO 24534规定了使用对称加密技术的电子注册标识(ERI)的要求，该技术基于分配给车辆的标识符（例如，用于国家当局的识别），适用于 国家当局对本地和外国车辆的电子识别， 车辆制造、在役维修和报废鉴定（车辆全生命周期管理）， 车辆数据的调整，例如在国际转售的情况下， 安全相关目的， 减少犯罪， 商业服务，以及 遵守隐私和数据保护法规。 ISO 24534-5:20 11规定了使用对称加密技术在电子注册标签（ERT）（包含ERI数据的车载设备）与车内或车外的ERI读取器或ERI写入器之间安全交换数据的接口。对称加密技术基于由特定用户群体共享的秘密密钥，即，在封闭的用户群体中，在封闭的用户群体中，密钥不会被泄露给外人是可信的。 它包括 ERT与机载ERI读取器或写入器之间的接口， 车载ERI设备与（路边）读写设备之间的接口，以及 与ERT通信相关的安全问题。

ISO 24534 provides the requirements for an electronic registration identification (ERI) using symmetric encryption techniques that are based on an identifier assigned to a vehicle (e.g. for recognition by national authorities) suitable to be used for

• electronic identification of local and foreign vehicles by national authorities,
• vehicle manufacturing, in-life maintenance and end-of-life identification (vehicle life-cycle management),
• adaptation of vehicle data, e.g. in case of international re-sales,
• safety related purposes,
• crime reduction,
• commercial services, and
• adhering to privacy and data protection regulations.

ISO 24534-5:2011 specifies the interfaces for a secure exchange of data between the electronic registration tag (ERT), which is the onboard device containing the ERI data, and the ERI reader or ERI writer in or outside the vehicle using symmetric encryption techniques. Symmetric encryption techniques are based on secret keys shared by a particular community of users, i.e. in closed user groups in which it is trusted that keys are not revealed to outsiders. It includes

• the interface between an ERT and an onboard ERI reader or writer,
• the interface between the onboard ERI equipment and (roadside) reading and writing equipment, and
• security issues related to the communication with the ERT.