LAS VEGAS–I’ve spent the last two days wearing a circular circuit board topped with a slab of quartz, which is not just normal but required behavior to attend the DEF CON security conference here.
I had heard upfront that DEF CON badges–available only for $300 in cash, no comped press admission available–were not like other conference badges. But I didn’t realize how much they differed until I popped the provided watch battery into my badge (of course, I put it in wrong side up on the first try), threaded the lanyard through the badge, and soon had other attendees asking if they could tap their badges against mine.
These badges designed by veteran hacker Joe Grand include their own wireless circuitry and embedded software that causes them to light up when held next to or close to other badges. As you do this with other attendees of various classes–from what I gathered, regular attendees have badges with white quartz, press with green, vendors with purple, and speakers with red–you will unlock other functions of the badge.
What other functions, I don’t know and won’t find out, as I’m now headed back from the event. That’s one way in which I’m a DEF CON n00b, the other being that I didn’t wear any other badges soldered together from circuit boards, LEDs and other electronic innards.
(Update: Saturday evening, Grand, aka “Kingpin,” posted detailed specifics about his creation, including source code and slides from a talk I’d missed.)
You might expect me to critique the unlabeled DEF CON badge for flunking at the core task of announcing your name to others, but forced disclosure is not what this event is about–hence the restriction to cash-only registration. And since I have mini business cards, this badge met another key conference-credential task quite well: The gap between the circuit board and the lanyard was just the right size to hold a stash of my own cards.