An individual dynamic road condition information generation and navigation system consists of a request unit and a processing unit;
一种个性化的动态路况信息生成及导航系统，由请求单元和处理 单元组成。
The scheme has the structure of hierarchical PKGs, so a lower-level PKG can share the workload of secret information generation and identity authentication with a higher-level PKG.
方案具有分层的PKG结构，低层PKG可以分担高层PKG的秘密信息产生和身份认证的任务；
The scheme has the structure of hierarchical PKGs, so a lower-level PKG can share the workload of secret information generation and identity authentication with a higher-level PKG.
方案具有分层的PKG结构，低层PKG可以分担高层PKG的秘密信息产生和身份认证的任务；
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