接着在此基础上介绍安全策略协商模型的系统结构，主要包含协商协议，协商对象，协商策略等部分。
Then it gives the structure of security policy negotiation model including negotiation protocol, negotiation object and negotiation tactics etc.
新结构的基本思想是：将安全策略的定义、策略决定和策略执行机制相分离。
The security policy definition, the policy decision and the security policy executing mechanism are independent to each other, and it is the design principle of the new architecture.
本文介绍了所采用的安全策略，重点介绍了全省交通CA认证管理系统组成结构。
The paper introduces the taken safe measures. The introduction centres on composition of traffic CA attestation management system in whole the province.
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