摘要： 针对现行证书验证方案存在的缺陷和交叉认证网模型中证书验证的复杂性，得出对交叉认证网模型证书验证进行优化的必要性，并提出了一个优化的证书验证方案，给出了优化设计的思路，对各种优化设计的技巧进行了说明，最后给出了该方案的实现流程图。

关键词: PKI；交叉认证；证书验证；信任路径

Abstract: The paper concludes that optimized certificate validation must be designed by analyzing the process of certificate validation in the current standard concerning the limitation and complication of certificate validation in the cross-certified network, and an optimized project of certificate validation for cross-certified network is proposed. It also provides the ideas of design of the project and offers explanation of various kinds of optimization skills. In the end, the flow chart of the project is presented.

Key words: PKI; Cross-certified; Certificate validation; Trusted path