一旦获同步光纤网络(SONET)授权，将显著减少用户网络延迟或等待的时间，确保大型信息文件安全。

Once in place on authorized Synchronous Optical Networks (SONET), users will experience significantly less network delay, or latency, common to securing large information files.

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简要介绍基于时间、基于事件同步、非同步认证原理，分析了动态认证技术安全性。

This paper first introduces principles of synchronous and asynchronous identification based on time and events, and then gives a through analysis of security in dynamic identification techniques.

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为了提高分布式测试系统中各设备单元的时间同步精度，需要研制安全可靠的时间源。

To achieve high time synchronization accuracy among various testing equipments of distributed measurement and control systems, a safe and reliable time source is required.

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