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July 2, 2026
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Security researchers demonstrate inexpensive one-minute method to clone master hotel key cards

Cryptography News
Security researchers demonstrate inexpensive one-minute method to clone master hotel key cards

Finnish security researchers Tomi Tuominen and Timo Hirvonen can clone many master hotel keys very quickly using their clever cryptography, an expired keycard from the hotel trash, and a $300 Proxmark RFID card reading and writing device. It takes them about one minute to create a master hotel key.

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