The U.S. government has delayed public disclosures of cyber incidents several times since new rules came into force last December, according to Matthew Olsen, assistant attorney general at the U.S. Department of Justice. He spoke with WSJ reporter Dustin Volz at WSJ Tech Live: Cybersecurity on June 6 about the government's reason for granting companies exemption to delay disclosing hacks. They also discussed the heightened risk of cyber attacks. Zoe Thomas hosts. Sign up for the WSJ's free Technology newsletter. Learn more about your ad choices. Visit megaphone.fm/adchoices