A December blackout of North Korea's Internet was retaliation for that nation's hacking of computers at Sony Corp.'s Hollywood studio, a top U.S. lawmaker on cybersecurity issues said without identifying who was responsible.
Rep. Michael McCaul of Texas, the Republican chairman of the House Homeland Security Committee, became on Tuesday the first U.S. official to link the outage as reprisal for disrupting computers at Sony Pictures Entertainment.
"There were some cyber-responses to North Korea," McCaul said earlier in his public remarks at the event hosted by the Center for Strategic and International Studies, a Washington think tank.