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Communications of the ACM

Privacy and security

The Air Gap: SCADA's Enduring Security Myth


IBM 360/195 playing chess

A control system protected by a real air gap: IBM 360/195 playing chess, November 1974.

Credit: Rutherford Appleton Laboratory; Science &Technology Facilities Council

Attempting to use isolation as a security strategy for critical systems is unrealistic in an increasingly connected world.

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