Glass Wall Calendar Dry Erase

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Dry Erase Marker Opens All Hotel Room Doors

If you’re carrying around an exposed circuit board and a bunch of wires people are going to notice you. But a dry erase marker won’t turn any heads. And this one holds its own little secret. It acts as a master key for hotel room door locks.

J&J worldwide Magnetic Whiteboard Calendar,
J&J worldwide Magnetic Whiteboard Calendar, ‘ x ‘ Glass Wall Calendar Dry Erase Board Monthly PlanSee more J&J worldwide Magnetic Whiteboard

This is really more of a repackaging hack. The exploit is already quite well-known. The Onity brand of key card locks most commonly used in hotels have a power jack on the bottom that doubles as a 1-wire communications port. The first published proof of concept used an Arduino board and a simple adapter to unlock any door in under one second. Now that hardware has been reduced in size so that it fits in the hollow shell of a dry erase marker. Even better, the felt tip has been replaced with the appropriately sized barrel jack. Check out the ultra-fast and inconspicuous use of it after the break. We think using this is no more obvious than actually having the key card.

Vinsetto "x" Dry Erase Wall Calendar Glass Whiteboard Monthly Planner  for Homeschool Supplies & Home Office Organization with  Markers and
Vinsetto “x” Dry Erase Wall Calendar Glass Whiteboard Monthly Planner for Homeschool Supplies & Home Office Organization with Markers and
TOWON Large Glass Dry Erase Calendar for Wall,  x  Inch Glass Calendar  Dry Erase Board, MagneticSee more TOWON Large Glass Dry Erase Calendar for
TOWON Large Glass Dry Erase Calendar for Wall, x Inch Glass Calendar Dry Erase Board, MagneticSee more TOWON Large Glass Dry Erase Calendar for
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