Nico Sell is a professional artist, athlete and entrepreneur based in California. She is CEO and cofounder of r00tz and Wickr. Wickr is a free messaging app enabling anyone to send self-destructing messages that are anonymous, private, and secure. r00tz is a nonprofit dedicated to teaching kids how to love being white-hat hackers. Nico also helps organize DEF CON, the largest hacker gathering in the world.