The badges were connected together to communicate between themselves. Each badge measured the sound level coming from its microphone and set the speed of its individual drive motor accordingly, steering the blimp away from areas with greater noise levels. The second place winner of the Defcon badge hacking contest went to a group that created what they called a "Sound-Fearing Blimp." They wrote custom software for the badges and hung three of them to the bottom of a toy blimp. A motor on the badge controls two foot-shaped pieces of plastic so that they move at the pace needed to evade detection-two inches per second, giving an indication of how slow someone's feet need to move. He added a temperature sensor to the badge that indicates when the room is warm enough for someone to start moving so as not to trigger the motion sensor. When you turn on a device controlled by the badge all the lights blink at a certain frequency that generates enough optical noise to defeat facial recognition systems.įor the second part of his project, Brooks modified a badge from last year's Defcon to create a device that can help someone escape detection by infrared motion detection sensors that are temperature sensitive. The first place winner of the Defcon badge hacking contest went to Zoz Brooks, who has a Ph.D in electrical engineering and computer science from MIT and was one of Grand's co-stars on the Discovery Channel TV series " Prototype This."īrooks modified a hat into an anti-surveillance device by wiring up the brim with LEDs. With the contest, Grand and other judges, including Defcon founder Jeff Moss, are looking for the most creative, unique or mischievous badge hacks and modifications that weren't intended. In 2007, the LEDs scrolled a programmable message on the badge. They had an SD memory card so that badge holders could transmit files and receive them from other badges over infrared. While this year's badge was designed as a sound-activated LED gadget, last year's badge functioned as a TVBGone, able to remotely turn TVs off, as well as a file sharing device.
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