Jeff Moss, a hacker and the founder of the Black Hat and DEFCON conferences, on Thursday was named chief security officer of the Internet Corp. for Assigned Names and Numbers (ICANN), an internet governance organization that oversees the domain name system and ensures domain names map to the correct IP addresses. Known in hacker circles as "Dark Tangent," Moss was hired for his "insider's knowledge that can only come from fighting in the trenches in the ongoing war against cyberthreats," said Rod Beckstrom, ICANN's president and CEO. Moss will continue his involvement with Black Hat in the new role of conference chairman.