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Submission + - Mobile Subscriber Identity Numbers Can Be Exposed Over Wi-Fi (csoonline.com)

itwbennett writes: Using fake cell towers to track and identify mobile phone users has been rendered passe by research Piers O'Hanlon and Ravishankar Borgaonkar from the University of Oxford's Department of Computer Science. The pair found that, for the purpose of tracking only, Wi-Fi networks can also be used to trick mobile devices into exposing their IMSI numbers. That's thanks to protocol and configuration weaknesses in mobile data offloading technologies such as automatic Wi-Fi connections and Wi-Fi calling that mobile operators are increasingly adopting to reduce costs and congestion on their cellular networks.
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Mobile Subscriber Identity Numbers Can Be Exposed Over Wi-Fi

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