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.

The surveillance by the National Security Agency, the government's chief eavesdropping agency, would rely on a set of sensors deployed in computer networks for critical infrastructure that would be triggered by unusual activity suggesting an impending cyber attack, though it wouldn't persistently monitor the whole system, these people said.

Defense contractor Raytheon Corp. recently won a classified contract for the initial phase of the surveillance effort valued at up to $100 million, said a person familiar with the project.

An NSA spokeswoman said the agency had no information to provide on the program. A Raytheon spokesman declined to comment.

Some industry and government officials familiar with the program see Perfect Citizen as an intrusion by the NSA into domestic affairs, while others say it is an important program to combat an emerging security threat that only the NSA is equipped to provide.

"The overall purpose of the [program] is our Government...feel[s] that they need to insure the Public Sector is doing all they can to secure Infrastructure critical to our National Security," said one internal Raytheon email, the text of which was seen by The Wall Street Journal. "Perfect Citizen is Big Brother."

The NSA is actively recruiting and hiring "Perfect Citizens" like YOU to staff this new, expanded role for the Agency. To apply, just attach your cover letter and resume to an email and send it to anyone. We'll process it and set up an in-person interrogation interview within 30 days.

We Listen To You!