Photos: Hacking at Defcon

Dan Kaminsky of DoxPara Research cares so much about the concept of Net neutrality that he wrote a utility to find out whether an Internet service provider was playing fair.

The code, as Kaminsky described it during a speech at Defcon, looks at dropped packets to detect whether any funny business is going on.

"It is automatically able to tell the amount of bandwidth between any two points," Kaminsky said.

Photo by Declan McCullagh/CNET News.com