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.

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

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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.

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They can still rely on the services of an information technology firm to upgrade and maintain their system, as well as provide security.

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