Public networks - and even private networks without security keys - often are not.

公共网络——乃至没有安全密匙的私人网络——通常并不安全。

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Do management or security personnel control the issuance of all the locks and keys?

所有的锁及钥匙是否有安全人员或管理人员负责控管？

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Certificates and Private Keys are much more secure than traditional username and password security methods.

证书和专用密钥比传统的用户名和口令安全性方法更为安全。

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Duty Manager is responsible for the security control of the hotel keys whilst on duty.

在当班时，值班经理根据安全需要负责控制酒店的钥匙。

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In addition, multiple keys provide a good security.

此外，多个密钥提供了一个良好的安全性。

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In addition, multiple keys provide a good security.

此外，多个密钥提供了一个良好的安全性。

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