System maintenance causes period of time when systems operate
differently than normal and may result in temporary or permanent
inappropriate or unsafe configurations. Maintenance can also be exploited by
attackers to create forgeries of sites being maintained, to exploit temporary
openings in systems created by the maintenance process, or other similar
purposes. Maintenance can accidentally result in the introduction of
viruses, by leaving improper settings, and by other similar accidental
events.
Complexity: Statistical
techniques and historical data appear to be quite sufficient to analyze
system maintenance.
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