PKI利用可信的第三方认证机构（CA）签发的数字证书在网络通信中建立和管理信任。

With the digital certification enacted by CA, Public Key Infrastructure (PKI) provides a framework to construct and manage the trust relationship.

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认证机构CA是PKI的核心执行机构，是PKI的主要组成部分，是一种权威性、可信任性和公正性的第三方机构。

CA is PKI's central executive organization, the main component of PKI, which is a third party representing authority, credibility and fairness.

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该文提出了一种包含可信任的第三方的网络认证结构，其结合了手形认证技术和加密技术。

This paper presents a trusted third party authentication architecture in which hand shapes verification techniques and cryptography techniques are combined.

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