GridEx cyber exercise highlights industry interdependencies, could lead to further DHS planning

This week's GridEx IV cyber exercise hosted by electric utility regulators highlights the interdependency of industries, with the results likely to be used by the Department of Homeland Security to hone the nation's cyber-response planning.

The exercise, which was sponsored by the North American Electric Reliability Corporation and took place Wednesday and Thursday, was meant to be a simulation of a massive cyber attack on the electrical grid. This year's exercise involved organizations from the telecommunications and financial sectors, as...