FBI director James Comey said today that America should not doubt that North Korea is responsible for the destructive attacks on Sony Pictures Entertainment's computer network last fall.
From the New York Times:
Mr. Comey said he had "high confidence" in the F.B.I.'s quick determination that North Korea was behind the attack. He said skeptics in the Internet security world who have suggested other theories for who was responsible did not have all the information he does. The F.B.I. director said national security concerns limited just how far law enforcement officials could go in revealing evidence that points to North Korea. But at a conference on cybersecurity in New York, Mr. Comey offered some of the evidence the F.B.I. had found.
One of the telltale pieces of evidence, he said, were a few I.P., or Internet Protocol, addresses that could be traced directly to servers used by North Korea. Mr. Comey said members of the group claiming responsibility for the hacking — Guardians of Peace — did a good job concealing their identities but slipped up in some cases. "They used proxy servers to disguise" the trail of evidence, Mr. Comey said. "But sometimes they got sloppy."
Comey spoke at the International Conference on Cyber Security, a four-day event coordinated by the FBI at Fordham University School of Law in New York City.
"Chief Says F.B.I. Has No Doubt That North Korea Attacked Sony" [nytimes.com]