Electrical power grid

The federal government of the United States admits that the electric power transmission is susceptible to cyberwarfare. The United States Department of Homeland Security works with industry to identify vulnerabilities and to help industry enhance the security of control system networks, the federal government is also working to ensure that security is built in as the next generation of "smart grid" networks are developed.In April 2009, reports surfaced that China and Russia had infiltrated the U.S. electrical grid and left behind software programs that could be used to disrupt the system, according to current and former national security officials. The North American Electric Reliability Corporation (NERC) has issued a public notice that warns that the electrical grid is not adequately protected from cyber attack. China denies intruding into the U.S. electrical grid. One countermeasure would be to disconnect the power grid from the Internet and run the net with droop speed control only. Massive power outages caused by a cyber attack, could disrupt the economy, distract from a simultaneous military attack, or create a national trauma.
Howard Schmidt, Cyber-Security Coordinator of the US, commented on those possibilities:
It’s possible that hackers have gotten into administrative computer systems of utility companies, but says those aren’t linked to the equipment controlling the grid, at least not in developed countries. Schmidt has never heard that the grid itself has been hacked.