There are seven types of objects that implement PKI functions. They are: Device Object, User Object, Context Object, Certification Object, Keyset Object, Envelop Object and Session Object.

• 在CIST中，完成和实现PKI功能的有七类对象：设备对象、用户对象、上下文对象、证书对象、密钥集对象、信封对象及会话对象。