Stuxnet virus engineered for subtle nuclear sabotage?

New and important evidence found in the sophisticated “Stuxnet” malware targeting industrial control systems provides strong hints that the code was designed to sabotage nuclear plants, and that it employs a subtle sabotage strategy that involves briefly speeding up and slowing down physical machinery at a plant over a span of weeks.

“It indicates that [Stuxnet's creators] wanted to get on the system and not be discovered and stay there for a long time and change the process subtly, but not break it,” says Liam O Murchu, researcher with Symantec Security Response, which published the new information in an updated paper (.pdf) on Friday.