A public key infrastructure (PKI) is a means for associating public keys with the respective user identities using a Certification Authority (ca).

公钥基础设施(PKI)是将公钥与使用证书颁发机构(CA)的相应用户标识进行关联的一种方法。

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The criteria can be different for each PKI, but once the CSR is approved, the CA fulfils the request by issuing a certificate.

对于每个 PKI，标准可能各不相同，但在批准 CSR 之后，CA 将通过颁发证书来完成请求。

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We analyze the present situation and question of ca construction in our country, discuss how to solve these questions and forecast the future research direction on PKI and the ca construction.

分析研究了我国CA建设的现状以及存在的问题，讨论了解决这些问题的方向，同时展望了PK I建设与CA构建继续研究的方向。

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Encourage and develop better authentication systems, including PKI (public key infrastructure) and CA (certificate authority) schemes.

CNN: Global panel issues Internet security recommendations