Interesting article about Thomas that references the controversy between Thomas and fellow Black Hat USA 2007 Speaker Joanna Rutkowska. To read his Black Hat presentation, go to:

https://www.blackhat.com/html/presentations/bh-usa-07/Ptacek_Goldsmith_and_Lawson/Presentation/bh-usa-07-ptacek_goldsmith_and_lawson.pdf

In the interest of equal time, you can find Joanna's presentation at :

htpp://www.blackhat.com/html/presentations/bh-usa-07/Rutkowska/Presentation/bh-usa-07-rutkowska.pdf