由主服务器发布的每个X . 509证书都有一个有效期。
Each X.509 certificate published by the primary server has an expiration date.
可信的证书权威机构发布数字证书，它们被用来鉴别用户和组织访问Web站点，e - mail服务器和其他安全系统的权限。
Trusted certificate authorities issue digital certificates, which are then used to authenticate users and organizations for access to Web sites, E-mail servers, and other secure systems.
在等待证书发布的同时，您可以创建一个自签名的数字证书来测试客户机与服务器之间的SSL会话。
While waiting for an issued certificate, you can create a self-signed digital certificate to test SSL sessions between clients and the server.
在等待证书发布的同时，您可以创建一个自签名的数字证书来测试客户机与服务器之间的SSL会话。
While waiting for an issued certificate, you can create a self-signed digital certificate to test SSL sessions between clients and the server.
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