Billy Hoffman is the lead security researcher for SPI Dynamics where he focuses on automated discovery of web application vulnerabilities and crawling technologies. He has been a guest speaker at Black Hat Federal, Black Hat USA, O'Reilly's Emerging Technology Conference, FooCamp, and several other conferences. He has also presented by invitation to the FBI. Billy also wrote TinyDisk, which implements a file system on a third party's web application to illustrate common weaknesses in web application design. In addition, Billy reviews white papers for the Web Application Security Consortium (WASC) and is the creator of Stripe Snoop, a suite of research tools that captures, modifies, validates, generates, analyzes, and shares data from magstripes. He also spends his time contributing to OSS projects, writing articles, and giving presentations under the handle Acidus.