jar是一个包，包含证书路径结构及JSSE运行时需要的验证功能，以便建立证书信任路径。

Certpath.jar is a package that contains certificate path construction and validation functions needed by the JSSE runtime in order to establish certificate trust paths.

youdao

该模型的实现方法是采用一个域间证书验证代理服务器，由服务器代替客户端完成证书路径的构建和验证。

The way to implement this model is using a delegated certificate validation server to fulfill the task of certificate path construction and validation on behalf of PKI clients.

youdao