The Application of CA Digital Certificate and Organizational Code Certificate;

最困难的问题是建立数字证书目录。

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A digital certificate is issued by a trusted authority (a certificate authority or ca) and is issued only for a limited time.

数字证书由受信任机构(认证机构或CA)发布，并且限制了使用期限。

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To show trust, a digital certificate is signed by a Certificate Authority (CA).

为了显示信任关系，数字证书可以由认证权威（CA）机构进行签名。

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