中文：
功能：零信任的核心思想是：默认情况下不应该信任网络内部和外部的任何人/设备/系统，需要基于认证和授权重构访问控制的信任基础。零信任对访问控制进行了范式上的颠覆，引导安全体系架构从网络中心化走向身份中心化，其本质诉求是以身份为中心进行访问控制。
English：
The function of APP is a tool:
Users have many web sites in their favorites, and they need to access them quickly, conveniently and safely. Users only need the corresponding background configuration of the APP to access them quickly on their mobile phones. For example, I like Apples mobile phones and computers very much, so I will often visit Apples official website to get the latest information. I will save apples official website, so THAT I can quickly access apples official website on my mobile phone.