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

[Brett Frankenberger <rbf+nanog () panix com>]

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