Most hotel chains these days rely on some sort of electronic key card mechanism rather than more traditional locks. Researchers at F-Secure have found that hotels worldwide are using an electronic lock system with a flaw that could be exploited by an attacker to gain access to any room in the building. The attack involves using any ordinary electronic key to the target facility -- even one that's long expired, discarded, or used to access spaces such as a garage or closet. Using information on the key, the researchers are able to create a master key with privileges to open…
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