Israel Tests on Stuxnet Worm Called Crucial in Iran Nuclear Delay

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The Dimona complex in the Negev desert is famous as the heavily guarded heart of Israels never-acknowledged nuclear arms program, where neat rows of factories make atomic fuel for the arsenal. Over the past two years, according to intelligence and military experts familiar with its operations, Dimona has taken on a new, equally secret role as a critical testing ground in a joint American and Israeli effort to undermine Irans efforts to make a bomb of its own.

The worm itself now appears to have included two major components. One was designed to send Irans nuclear centrifuges spinning wildly out of control. Another seems right out of the movies: The computer program also secretly recorded what normal operations at the nuclear plant looked like, then played those readings back to plant operators, like a pre-recorded security tape in a bank heist, so that it would appear that everything was operating normally while the centrifuges were actually tearing themselves apart. The attacks were not fully successful: Some parts of Irans operations ground to a halt, while others survived, according to the reports of international nuclear inspectors. Nor is it clear the attacks are over: Some experts who have examined the code believe it contains the seeds for yet more versions and assaults.

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