THE International Atomic Energy Agency could add computer security at
nuclear plants to its remit after it emerged that stuxnet, the first
computer worm known to attack industrial machinery, is indeed targeted
at nuclear energy equipment as many observers had suspected.

Delivered online or via a USB stick, stuxnet used now-patched Windows
vulnerabilities to seek out Windows PCs running software that monitors
industrial control computers made by Siemens of Germany. The higher
the frequency, the faster the motor.

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