Defense in-depth is all about having redundant security measures in place — not only encryption but also smart handling of user-supplied data.

深层防御是将多余的安全方法都妥善保管——不仅包括加密，还包括用户所提供数据的智能处理。

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This is useful for processing security alerts as well as redundant and distributed Nagios setups.

这对于处理安全性警告以及冗余和分布式 Nagios 设置都很有用。

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Furthermore, the data collision, data redundant and data security of RFID in container transportation are studied, and the solutions for these issues are provided.

本文还进一步研究了RFID技术在集装箱数据采集过程中所遇到的数据碰撞、数据冗余以及数据安全问题，并给出了相应的解决方案。

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But the redundant layers of security, the tremendous work of the counterterrorism professionals, law enforcement, homeland security, intelligence, was the reason why we were able to succeed.

WHITEHOUSE: Full Briefing on Security Alert

Some milbloggers believe the new regulations are redundant, because ample operational security guidelines are already in place.

NPR: U.S. Army May Restrict Soldiers' Blogs

Earlier this month about 920 soldiers and 930 RAF personnel were told they were being made redundant, in the first tranche of cuts announced in last year's Strategic Defence and Security Review.

BBC: Fox says ex-MoD chiefs partly to blame as job cuts loom