How should PKI system interconnect and interflow better, which inorder to meet the needs of operating each other among CA and End Entities, thissubject matter studied by the trust model of PKI.

• 各个PKI体系如何更好地互连互通,以更好的满足CA及实体间相互信任的需要,这就是PKI的信任模型研究的主要问题。