The DHS pitch: We’ll share intelligence gleaned from the U.S. government’s vast stockpile of zero-day vulnerabilities — purchased from bug hunters and resellers — to help block zero-day threats. “It is a way to share information about known vulnerabilities that may not be commonly available,” Homeland Security secretary Janet Napolitano said Wednesday at the Reuters Cybersecurity Summit in Washington, D.C., reported Reuters. The DHS proposal is a continuation of the February 2013 executive order and related presidential policy directive issued by President Obama, which created a public-private cyber-threat information sharing regime, as well as voluntary private sector cybersecurity standards.