The identity of the Sony hackers is still unknown. President Obama, in a December 19 press conference, announced: "We can confirm that North Korea engaged in this attack." He then vowed: "We will respond. ... We cannot have a society in which some dictator some place can start imposing censorship here in the United States."
The U.S. Government's campaign to blame North Korea actually began two days earlier, when The New York Times -- as usual -- corruptly granted anonymity to "senior administration officials" to disseminate their inflammatory claims with no accountability. These hidden "American officials" used the Paper of Record to announce that they "have concluded that North Korea was 'centrally involved' in the hacking of Sony Pictures computers." With virtually no skepticism about the official accusation, reporters David Sanger and Nicole Perlroth deemed the incident a "cyberterrorism attack" and devoted the bulk of the article to examining the retaliatory actions the government could take against the North Koreans.
The same day, The Washington Post granted anonymity to officials in order to print this:
The NYT and Post engaged in this stenography in the face of numerous security experts loudly noting how sparse and unconvincing was the available evidence against North Korea. Kim Zetter in Wired -- literally moments before the NYT laundered the accusation via anonymous officials -- proclaimed the evidence of North Korea's involvement "flimsy." About the U.S. government's accusation in the NYT, she wisely wrote: "they have provided no evidence to support this and without knowing even what agency the officials belong to, it's difficult to know what to make of the claim. And we should point out that intelligence agencies and government officials have jumped to hasty conclusions or misled the public in the past because it was politically expedient."