Researchers at the University of Washington have developed a new system called SeaGlass that helps detect cellphone surveillance by modelling a city’s cellular landscape and identifying suspicious anomalies. Cell phones are vulnerable to attacks from rogue cellular transmitters called International Mobile Subscriber Identity (IMSI) catchers, also known as cell-site simulators or Stingrays, surveillance devices that can precisely locate mobile phones, eavesdrop on conversations or send spam, Xinhua news agency reported.

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