Peiter C. Zatko, better known as Mudge, is a network security expert, open source programmer, writer, and a hacker. He was the most prominent member of the high profile hacker think tank the L0pht as well as the long-lived computer and culture hacking cooperative the Cult of the Dead Cow.While involved with the L0pht, Mudge contributed significantly to disclosure and education on information and security vulnerabilities.