The Iranian computers used in their nuclear weapons production program have been mysteriously hit by Stuxnet, a computer worm of enormous sophistication and lethal capability. New Scientist has some very helpful background on how the worm operates and why it represents a quantum leap in terms of the potential hazard.
The fact that this worm seems to be concentrated in Iran and has infected their nuclear program naturally raises a lot of questions. For instance:
Who designed this worm? It seems to require resources that only a national organization could command. Is this a strategy initiated by the U.S. or Israel to compromise the Iranian nuclear program without having to launch military strikes or is there some other player involved (Some have suggested the Chinese)? If so, will it work, and how will Iran respond? Will they launch a cyber attack against whomever turns out to be the source of the worm?
Stay tuned.