1. White hat hackers you should know: Marc "Chameleon" Maiffret
Like many hackers, Marc Maiffret's career grew out of a teenage hobby. But his efforts to enter government systems were dramatically curtailed at the age of 17 by an unwelcome wake up call: an FBI agent holding a gun to his head. Although his computer was confiscated, Maiffret was never charged with a crime. He heeded the warning nonetheless, and sought gainful employment as a researcher.
Years later, he worked as a consultant for the very agency that had raided his home and changed his life. His expertise also led him to testify before the United States Congress on matters of cybersecurity on three separate occasions. Maiffret cofounded software security company eEye Digital Security and built his professional reputation on exposing vulnerabilities in Microsoft products, such as the infamous Code Red worm.