Don’t be shocked at spies tracking your phone: opinion

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The press has been in a lather of late over reports that the US Department of Homeland Security had discovered evidence that cellphone tracking tools were being used by “unauthorised” parties in and around Washington. 

Formally known as International Mobile Subscriber Identity catchers, and often called stingrays, these devices fool your phone’s baseband into believing it is in contact with a cell tower. IMSI catchers can use your phone’s signal to track your movements and contacts. In some cases they might persuade your phone to turn off its encryption.