No Nation state has ever been definitively linked to an act of cyber warfare, but the internet is certainly being used as a battlefield. Even though governments are not owning up to it, two recent events make state involvement look more likely than ever. Earlier this year, security firm VirusBlokAda discovered a highly sophisticated computer worm called Stuxnet. It was unusual in that it was designed to secretly infect and commandeer industrial computer systems. Most of the sites affected were in Iran, and the worm's sophistication together with the choice of target suggest the involvement of a state, possibly Israel. It is likely that the worm was designed to disrupt the country's uranium-enrichment centrifuges, a suspicion bolstered when the Iranian government recently confirmed that Stuxnet had "created problems" at its facility in Natanz.
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