公开密钥基础设施综述

使用PKI可以建立一个安全的网络环境，使用户可以在多种应用环境下方便的使用加密和数字签名技术，从而保证数据的机密性、完整性、有效性和抗抵赖性，可以说PKI是网络系统安全运行的基础。文章介绍了PKI的组成、功能等，重点介绍了证书撤销和信任模型。最后指出当前PKI系统的不足。

Public Key Infrastructure

Network Security is an essential precondition of the network activity. A secure Network environment can be constructed using PKI. Confidentiality,integrity,availability,non-repudiation can come true under various application environment if user use cryptography and digital signature technology based on PKI. PKI is the foundation stone of the whole security network system. This paper introduces the components of PKI and their functions. Certificate revocation and trust models of PKI are emphasized. In the end,the disadvantage of PKI is pointed out.