US seeks China help against North Korea cyberattacks after Sony hack – report

Officials tell New York Times approach is part of ‘proportional response’US-China relations have been strained over cybersecurity issuesNorth Korea demands joint investigation into Sony Pictures hackOpinion: Can we all calm down about cyberwar with North Korea?The US government has reportedly asked China to help block North Korea’s ability to launch cyberattacks, in the wake of the massive hack of Sony Pictures.Administration officials told the New York Times the sought-for cooperation was