Grid security is based on the PKI certificate X. 509 mechanism.

现有网格的安全尺度采取了基于X.509证书的PKI机制。

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You will need your X.509 certificate files and your access keys.

您将需要您的X . 509证书文件和您的访问密匙。

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Each X.509 certificate published by the primary server has an expiration date.

由主服务器发布的每个X . 509证书都有一个有效期。

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The original was refused a certificate by the British Board of Film Classification in 1975, which felt its focus on sadistic terror and "abnormal psychology" was unsuitable - although some local councils allowed it to be shown with an X certificate.

BBC: The Hobbit chased off by Chainsaw