Re: OT: Traffic Light Control (was Re: First real-world SCADA attack in US)

On Wed, Nov 23, 2011 at 05:45:08PM -0500, Jay Ashworth wrote:

Yeah. But at least that's stuff you have a hope of managing. "Firmware underwent bit rot" is simply not visible -- unless there's, say, signature tracing through the main controller.

I can't speak to traffic light controllers directly, but at least some vital logical controllers do check signatures of their firmware and programming and will fail into a safe configuration if the signatures don't validate. -- Brett