The U.S. government and the private sector must cooperate to improve the security of digital networks, a U.S. presidential commission on cyber security recommended in a wide-ranging report issued on Friday. The commission created by President Barack Obama earlier this year also recommended that the president and Congress accelerate the pace at which technology is updated in the federal sector and that the president appoint an ambassador for cyber security for efforts abroad. Obama said in a statement after meeting the commission's head, his former national security adviser Tom Donilon, on Friday that his administration strongly supported the commission's "thoughtful and pragmatic" recommendations.