I went to the Opening Ceremonies of DEF CON 23 this morning to get more information on the badge challenge and I was not disappointed. The talk covered the Uber badge, which is hot in a literally ...

We have a lot to draw on for a conference badge puzzle. The most famous, of course, being the DEF CON badges from the great mind of [1O57]. For the last few years, the DEF CON badge has been the ...