`` Unequivocally , they are not responsible , '' a cybersecurity expert says about North Korea . ` It 's clear to us , based on both forensic and other evidence we 've collected , that unequivocally they are not responsible for orchestrating or initiating the attack on Sony , '' said Sam Glines , who runs the cybersecurity company Norse . The United States and South Korea have been conducting joint military exercises in the region for months to practice their response if war broke out on the Korean Peninsula or elsewhere around the world. Hackers have often taken shots at Sony . In 2011 , hackers stole the data of an estimated 77 million people .
`` Unequivocally , they are not responsible , '' a cybersecurity expert says about North Korea . The United States and South Korea have been conducting joint military exercises in the region for months to practice their response if war broke out on the Korean Peninsula or elsewhere around the world. Hackers have often taken shots at Sony . In 2011 , hackers stole the data of an estimated 77 million people .