Is North Korea Behind Sony Pictures Hack?

Is the massive hack against Sony Pictures a result of North Korean hacking? A number of reports suggest that the country might be behind the hacking of Sony Pictures last week, which completely took down Sony's corporate network--and apparently also has been linked to the release of a number of current and as-yet-to-be-released films to file sharing sites. The reports speculate that North Korea officials may have been irked by the upcoming release of the Sony Pictures comedy The Interview, where James Franco and Seth Rogen play a pair of television hosts tasked with assassinating North Korean dictator Kim Jong-un.