H D Moore (born 1981) is a security researcher who has been active on internet mailing lists since 1998. H D Moore works as the Director of Security Research for BreakingPoint Systems, where he focuses on the security testing features of the BreakingPoint product line. Prior to joining BreakingPoint, HD co-founded Digital Defense, a managed security services firm, where he developed the vulnerability assessment platform and led the security research team.