"[...] at the 28th Chaos Communications Congress (28C3), in Berlin, security researchers along with Karsten Nohl and Luca Melette showcased a number of flaws and solutions in GSM mobile phone networks."
Karsten Nohl presenting “Defending Mobile Phones” at the 28th Chaos Communications Congress.
An additional technique used to locate mobile phones is the so-called Silent SMS. These messages are silently ignored by the majority of mobile phones and give no indication to the user. But the messages leave trails in customer service records, the logs kept by mobile carriers, and allow monitors to correlate a mobile phone’s location with that of cell towers.
Our presenters have developed free software, CatcherCatcher, which detects features used by IMSI catchers that regular cell towers don’t use. The GSM security map, a site that uses data from the CatcherCatcher tool, helps to track unauthorized mobile phone monitoring.
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