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Citywide RFID Master House Key? Already Broken

In the bad old days, city apartment buildings often allowed entry to postal or emergency workers with a single master key, which was easily copied or sold on the black market. Many buildings are today switching to RFID-based key cards, citing an advance in security. Yet this claim is certainly suspect. Speaking at the Chaos Communication Congress (CCC) here, security researcher Adrian Dabrowski said a reverse-engineering project had let him open more than 90 percent of the electronically locked apartment doors in his home city of Vienna.

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