http://zdnet.com.com/2100-1104-933853.html

Item duplication - a multi-billion dollar industry?
It's a very good article for sure, and if you're even the slightest bit interested/worried about game cheating, you should read it.

"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram