For the 2nd year at Defcon, clues were left on the rotunda floors by 1o57. I didn't spend anytime on figuring them out this year due to a number of reasons, basically technical reasons. I was not able to connect to the Defcon Secure Wifi so my resources were an issue. In any case, I hope the pictures help for your personal entertainment and learning. There were more clues tweeted by 1o57 from his twitter account, so the bread crumbs are all over the place. You just have to put it all together.
