This new system provides secure communication between bi-users and multi-users over an insecure communication channel.

该方案利用现有不保密通信信道提供双用户或多用户之间的可靠保密通信。

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By using Confidentiality we can make sure that nobody can read the message that is sent over insecure communication channels.

通过使用机密性，我们可以确保没有人能够读取在非安全的通信隧道上传输的消息。

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If the Web Service switches to another transport such as insecure HTTP that does not have an encrypted communication channel, then the message is transmitted again in clear text.

如果Web服务切换到另一个传输，比如不具有加密通信隧道的非安全的HTTP，那么消息将再次以明文传输。

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