Interesting talk by Simson Garfinkel

Simson L. Garfinkel is an Associate Professor at the Naval Postgraduate School in Monterey, California. Garfinkel is regarded as a leader in the fields of Digital forensics and Usable Security. In addition to his academic work, Garfinkel is a journalist, an entrepreneur, and an inventor, his work in all three concerned with computer security, privacy and information technology.

http://en.wikipedia.org/wiki/Simson_Garfinkel