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The Vingcard Vision locks are RFID-based hotel locks; at this week's Infiltrate conference in Miami, Tomi Tuominen and Timo Hirvonen from F-Secure will present a method for combining a $300 Proxmark RFID tool with any discarded key from a given hotel to derive the master keys that allow them to unlock every room in the hotel, a process that takes less than 60 seconds. (more…)