The badge features an LED display with scrolling text, and it even has an easter egg (typing in 31337 outputs “$kingpin$”, the board maker’s handle) Creator Joe Grand designed it to be hacked. The badge is given away as prizes for various DefCon activities and provides the recipient with a lifetime free pass to DefCon. The hack was done by Wired’s photographer Dave Bullock, who hacked the badge for 10 minutes. He says the badge that was hacked was actually his press badge.”]
Source: https://gizmodo.com/defcon-badge-hacked-in-10-minutes-285998