â€This must be the new trick this year; they said â€OK, don´t shave,´ â€ says Priest, a Def Con â€goonâ€ (that is, a conference security guard and friend of organizer Jeff Moss). Priest is supposed to be introducing a panel presentation on wireless security, but instead he´s talking to an otherwise clean-cut attendee with a two-day beard and a nervous smile. Until a moment ago, the 40-something guy with the stubble had been sitting quietly in the audience. Then a kid in his row decided he looked suspicious. Now they are both onstage, and Stubble is answering questions.