New cell phone surveillance method raises privacy concerns

The FBI is using a new method to access cell phone customer data,but the American Civil Liberties Union (ACLU) contends that the method is overly invasive.

The method,known as “stingrays,” uses a person’s international mobile subscriber identity (IMSI) secretly to track someone’s location using stingray devices, known as IMSI catchers. The catcher mimics a cell phone tower, but stingrays track the locations of all mobile devices in a given area,including those which are not being targeted.

NBC reports that abig reason this scares privacy groups is that an IMSI catcher can be built at home for about $1,500, exposing weakness in cell phone security to which most consumers are oblivious.

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