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Revoking Security Access Is Not Enough

A California man has been arrested for interfering with computers at the California Independent System Operator (Cal-ISO) agency, which controls the state’s power transmission lines and runs its energy trading markets. Even though Lonnie C. Denison’s security access had been suspended at the request of his employer because of an employee dispute, he allegedly gained physical access to the facility with his card key. Once inside, Denison allegedly broke the glass protecting an emergency power cut-off station and pushed the button, causing much of the data center to shut down. Cal-ISO was unable to access the energy trading market, but the power transmission grid was unaffected.

– SANS

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