{"id":69,"date":"2012-03-19T23:37:16","date_gmt":"2012-03-20T05:37:16","guid":{"rendered":"http:\/\/www.firmwarez.com\/?p=69"},"modified":"2012-08-30T08:59:50","modified_gmt":"2012-08-30T14:59:50","slug":"defcon-17-badge-hack","status":"publish","type":"post","link":"http:\/\/www.firmwarez.com\/?p=69","title":{"rendered":"Defcon 17 Badge Hack"},"content":{"rendered":"

At Defcon 17 I competed with some friends<\/a> in the badge hack contest. Friends had a home built Geiger counter,shown here with a hacked EFF “cat looks at butt<\/a>” sticker. We interfaced it to the badge along with a wireless link and developed firmware that would allow the Geiger counter<\/a> badge to send truly random bits to a PC for cryptographically secure key generation. The old FirmWarez site<\/a> features a screen capture of that project in process.<\/p>\n

We were one of the featured badge hack entries in Wired’s “Threat Level”<\/a> blog.<\/p>\n

Check out the “cat looks at butt<\/a>” picture again. Upper left an old fashioned 7805 regulator is hot glued to the case. We needed +5V. Most of the stuff in our system was either +12V or +3.3V. I walked in to the HHV (hardware hacking village)<\/a>, went to the junk box, stood there, looking at boards, and thought “yeah, that one will have a 7805”. First board I picked up, and I was right. DefCon moment.<\/p>\n

Kingpin<\/a> posted a video of our entry. You can briefly see my Uzitalk<\/a> t-shirt. We were only slightly radioactive.<\/p>\n