Scott Renfro:

  Scott grew up in Silicon Valley in the days of the homebrew computer
  club, hacking on anything that came his way.  After college, he spent
  7 years on active duty hacking on military hardware and software.
  For the last ten years he's focused on secure systems -- mostly
  finding and fixing security flaws in large systems, including his
  own.  He currently works for one of the largest surviving dot-coms,
  teaching others how to enjoy worrying about security.