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Protecting Industrial Control Systems from Electronic Threats by Joseph Weiss

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SCADA Systems

SCADA systems are highly distributed systems used to control geographically dispersed assets, often scattered over thousands of square miles, where centralized data acquisition and control are critical to system operation. They are used in distribution systems such as water distribution and wastewater collection systems, oil and gas pipelines, electrical power grids, and railway transportation systems. A SCADA control center performs centralized monitoring and control for field sites over long-distance communications networks, including monitoring alarms and processing status data (Figure 3.1). Electric SCADA systems often have reliability requirements of 99.99999 percent per year. That is, they can only have 5 minutes of downtime ...

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