Fanning is most well known for developing Napster, one of the most popular P2P music platforms in 1999. Since the shutdown of the free P2P service in 2001, Fanning has worked at a number of startups.
Terry Davis is the sole author of TempleOS which he described as a a free, public domain, open source, x86_64, non-preemptive multi-tasking, multi-cored, ring-0-only, single-address-map (identity-mapped), non-networked, PC operating system. Davis was born December 1969 and has been diagnosed with schizophrenia since the mid-1990s. Development for TempleOS began in 2003 after Davis suffered from a series of manic episodes that left him briefly hospitalized for mental health issues. The operating system was coded in a programming language, developed by Davis in C/C++ called "HolyC". The OS runs a file system called "Red Sea".
Billy Markus is ne of the co-founders of Dogecoin, along with Jackson Palmer. Markus is the programmer who modified an existing litecoin wallet, creating dogecoin-qt.
From his Hacker Halted bio:
"Tim Fowler is a security consultant with the Western North Carolina security firm mountainsec LLC. He frequently speaks throughout the Southeast on various topics ranging from information security, open source in the enterprise and emerging open source technologies."
Tim primarily gives talks on wireless, whether it be building sensor networks, or defending yourself from a zombie invasing using wireless mesh networks.
Zack Anderson is co-founder and COO of Levant Power Corp. He was originally scheduled to give his first DEFCON talk at DEFCON 16 regarding MTA Subway Hacking. However, a federal injunction prevented him from giving the talk. As a result of the MTA's federal claim, their presentation became a part of public record thus allowing the world to see the results of their research.
Allan Jay Dumanhug Tomol a.k.a PV.AtOm / atom is a member of Pinoy Vendetta. He claims to be teaching ethical hacking but is not really ethical because he defaces websites and tests a certain website without permission. He has a self-interview about himself in Webgeek (http://webgeek.ph/t/interview-with-allan-jay-tomol-web-security-research...) where he received a lot of negative comments.
He is an active Iranian security researcher and vulnerability reporter. He owns the forum black-hg.org (~ Iranian Blackhat Group #BHG).
Fahmi Ben Khlifa a.k.a xTNR3v0lt is a the founder of Tunisian Cyber Army. After getting out of Tunisian prison, he has moved to being a whitehat by identifying XSS vulnerabilities in prolific websites like The Wall Street Journal, The Pentagon, Bank of America, and Samsung.
Joshua Hill a.k.a p0sixninja has been an inspirational (yet sometimes controversial) figure in the iOS Jailbreaking scene for over 5 years now(as of this writing). He was the chief architect and developer for the software used in the GreenPois0n and Absinthe jailbreaks, and also performed research to help find and exploit many of the vulnerabilities used.