U.S. security firm CrowdStrike provides further evidence that North Korea is responsible for Sony attack. CrowdStrike says it found similarities between the malware used against Sony and a piece of destructive code deployed in 2013 by a group it calls Silent Chollima. The FBI has already named North Korea as the source of the attack, but some security experts have been skeptical. The group that claimed responsibility for the attack calls itself Guardians of Peace, but may have done the same with Sony, CrowdStrike’s CTO says.”]

