The security of information system is vital.

信息系统的安全是至关重要的。

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Computer virus is a great threat to the security of information system.

计算机病毒是信息系统安全的大敌之一。

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Employ various security tools to monitor the security of information system.

使用各种各样的安全工具监测信息系统安全。

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The report says the U.S.military's Djibouti-based Combined Joint Task Force-Horn of Africa is currently installing a Maritime Security and Safety Information System in key positions along the Kenyan coast.

VOA: standard.2009.05.01

Yet as UAV technology improves they are set to become an even more important part of security and military operations -- part of a system that gathers and relays information to other drones, ground control, manned aircraft and satellites.

CNN: Doing military's dangerous, dull and dirty work

SELinux includes security enhancements to the operating system that can enforce the separation of information based on the confidentiality and integrity requirements.

CNN: Sci-Tech - PGP working with NSA on Security Enhanced Linux

The NYPD also maintains a "Ring of Steel, " a network of 4, 000 sophisticated security cameras that feed information into a central monitoring system to detect questionable or unlawful activity.

WSJ: Judith Miller: How to Stop Terrorists Before They Kill