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。

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

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首先，确保发生任何非功能性的变化之前，已经存在已知的、良好的、签署过的功能基线。

First, it ensures that you have a baseline of known-good, signed-off functionality before making any non-functional changes.

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该机制可有效地阻止对EPCIS系统和资源的非授权访问，从而确保对EPCIS访问的安全性。

The mechanism can guarantee safe access to EPCIS system by preventing the unauthorized access to EPCIS system or resources.

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