But the configuration Stuxnet was looking for was so precise that it was likely to be found in only a single facility in Iran or, if more than one, then facilities configured exactly the same, to control an identical process. Any system that didn’t have this exact configuration would remain unharmed; Stuxnet would simply shut itself down and move on to the next system in search of its target. The idea that someone had put so much money and effort into a weapon attacking a single target left Langner dumbfounded. It could mean only one thing—the target had to be extraordinarily important. Now
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