Wired / ThreatLevel: Equipment Maker Caught Installing Backdoor Account in Control System Code Industrial control modes made by Rugged Operating Systems, a Canadian Manufacturer, have been found to have an easily compromised backdoor access. These modules are often used in railway & electric utility control systems. An independent researcher bought 2 unused modules through E-bay and analyzed the firmware. Rugged Control Systems is now own by Siemens, a German firm whose own products recently were shown to have a compromised backdoor access when the Stuxnet worm used it to attack Iranian centrifuges. According to the Wired article, Rugged Control Systems did not seem to be particularly responsive or concerned when they were informed that the backdoor had been found.