AP: North Korea-Linked Sony Attack may be the Costliest Ever

The unprecedented hack of Sony Pictures which a U.S. official says is linked to North Korea may be the most damaging cyberattack ever inflicted on an American business.

The fallout from the hack that exposed a trove of sensitive documents, and this week escalated to threats of terrorism, forced Sony to cancel release of the North Korean spoof movie “The Interview.” The studio’s reputation is in tatters as embarrassing revelations spill from tens of thousands of leaked emails and other company materials.

Federal investigators believe there is a connection between the Sony hack and the isolated communist nation, according to an official who spoke on condition of anonymity. The official was not authorized to openly discuss an ongoing criminal case…

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