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Protecting Industrial Control Systems from Electronic Threats by Joseph Weiss

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Chapter 5. Differences between Industrial Control Systems and Information Technology

First and foremost, the reason for this discussion is that industrial control system (ICS) cyber impacts can, and have, killed people. Secondly, if information technology (IT) policies, procedures, technologies, and testing were sufficient to secure ICSs, there would be no need for “supervisory control and data acquisition (SCADA) security,” but they are not. A fundamental problem is the tendency to view cyber security technologies and threats as being equally applicable to IT and ICSs. Certain mainstream IT security technologies adversely affect the operation of ICSs. Examples include using port-scanning tools, which result in components freezing up (or worse), ...

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