U.S. Plans Cyber Shield for Utilities, Companies

The control room at a nuclear-power plant in Limerick, Pa. The National Security Agency's 'Perfect Citizen' program will detect cyber assaults on critical infrastructure, but could also help companies in other fields, such as Google, which sustained a major attack late last year.

Bloomberg News
By Siobhan Gorman

(See Corrections & Amplifications item below.)

The federal government is launching an expansive program dubbed "Perfect Citizen" to detect cyber assaults on private companies and government agencies running such critical infrastructure as the electricity grid and nuclear-power plants, according to people familiar with the program.

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