ISO 14819-6:2006 交通和旅行者信息-通过交通信息编码TTI信息-第6部分：无线电通信数据系统编码协议 ALERT-C交通信息频（路边酒精浓度鉴定试验）道C译码

标准编号：ISO 14819-6:2006

中文名称：交通和旅行者信息-通过交通信息编码TTI信息-第6部分：无线电通信数据系统编码协议 ALERT-C交通信息频（路边酒精浓度鉴定试验）道C译码

英文名称：Traffic and Traveller Information (TTI) — TTI messages via traffic message coding — Part 6: Encryption and conditional access for the Radio Data System — Traffic Message Channel ALERT C coding

发布日期：2006-04

标准范围

ISO 14819-6:2006建立了一种对RDS-TMC 8A型数据组中携带的ALERT-C编码数据的某些元素进行加密的方法，这样，如果终端或接收器不使用适当的密钥，所传递的信息实际上毫无价值。在终端能够解密数据之前，终端需要两个“密钥”。第一种是由服务提供商向与其有商业关系的终端制造商保密；第二个是在“加密管理组”中广播，该组也是8A型组。本规范解释了两个密钥的用途，以及更改传输密钥的频率和时间。在单个终端向最终用户呈现解密消息之前，必须激活该终端。激活需要输入PIN码。PIN码控制每个服务和订阅期的访问权限，允许终身和长期业务模式共存。该规范还描述了服务提供商希望引入加密的RDS-TMC服务的注意事项，这些服务从基于公共“位置表”的“免费”服务或基于专有位置表的商业服务迁移而来。最后，8A类型组的位分配中保留了“hook”，以允许将加密扩展到其他RD-TMC服务。

ISO 14819-6:2006 establishes a method of encrypting certain elements of the ALERT-C coded data carried in the RDS-TMC type 8A data group, such that without application by a terminal or receiver of an appropriate keys, the information conveyed is virtually worthless.Before a terminal is able to decrypt the data, the terminal requires two "keys". The first is given in confidence by the service provider to terminal manufacturers with whom they have a commercial relationship; the second is broadcast in the "Encryption Administration Group," which is also a type 8A group. This specification explains the purpose of the two keys and how often and when the transmitted key may be changed.Before an individual terminal may present decrypted messages to the end-user, it must have been activated to do so. Activation requires that a PIN code be entered. The PIN code controls access rights to each service and subscription period, allowing both lifetime and term business models to co-exist.The specification also describes the considerations for service providers wishing to introduce an encrypted RDS-TMC service, migrating from either a "free-to-air" service based on public "Location Tables" or a commercial service based on a proprietary Location Table.Finally, "hooks" have been left in the bit allocation of the type 8A group to allow extension of encryption to other RDS-TMC services.

标准预览图