公钥基础设施）以密码学为理论基础，以公钥证书为载体，较好地解决了网络中的信任问题。

PKI ( Public Key Infrastructure), which is on the base of cryptography, resolved the issue of trust perfectly using public key certificate as a carrier.

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本文专注于对公钥基础设施的一些关键的技术问题进行研究，为公钥基础设施的开发和部署提供理论基础。

This paper focuses on studying and analyzing some key techniques of Public key Infrastructure. All the research result will lay the foundation of development and deployment of a PKI.

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