You can buffer overflow the human brain just as you would a rinky dink FTP program. You can identify if people are being evasive in responses and you can identify what emotions people are exhibiting based on their facial expressions and mannerisms.

Dan Tentler
I've been doing IT in one form or another since 1998 - since 95 if you count teenage experimentation with linux. Since my very first dealings with redhat (read: getting bind rooted and my box pwned) to windows95 mysteriously locking up on me (winnuke), to the sasser worms in win2k and beyond I've had one leg in the security pool since the very beginning. I've spent my professional time at companies like Intuit, Websense, Anonymizer, various San Diego based Internet Service Providers, and a slurry of IT and Security consulting gigs. I started on the bottom rung: Entry level ISP Dialup tech support, worked my way up to sysadmin, then Systems Architect and now go back and forth between InfoSec contracts and Systems Architecture contracts. I'm one of the lead organizers for BarCamp San Diego, and I've been organizing the 'DefCamp' hacking contests inside of BarCamp San Diego. I give free presentations around town for places like Qualcomm describing some clever things you can do with basic security tools, and how to safely compute in places like hotels and conferences. Recently as a hobby I started getting into Kinesics - which is reading body language. Immediately I started to see how this could be used in the world of InfoSec. I've since began making direct correlations between things like NLP, Kinesics and the world of hacking and I've found a large number of similarities.