The future of SCADA-control security
If you're a CXO overseeing a critical infrastructure that contains SCADA (supervisory control and data acquisition) controls, a chief concern is how to protect the infrastructure against terrorist attacks. Changes in control software will continue to accelerate until the most critical infrastructure weaknesses (oil refineries, electrical power plants, water treatment facilities) are addressed worldwide. But it may take years to replace all of the controls.
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Story added 4. May 2012, content source with full text you can find at link above.