The ACLU is filing a Freedom of Information Act (FOIA) request today for information about a newly revealed Marshals Service program that uses aircraft to suck up location data from tens of thousands of people’s cell phones at a time.
The U.S. Marshals Service program, exposed last week by the Wall Street Journal, involves Cessna planes equipped with “cell site simulators” flying from at least five airports around the country. Cell site simulators, also called IMSI catchers, impersonate a wireless service provider’s cell tower, prompting cell phones and other wireless devices to communicate with them instead of the nearest tower. In doing do so, the simulators can learn all sorts of information that facilitates accurate location tracking, including the electronic serial numbers and other information about the phone and the direction and strength of the phone’s signal.
The government apparently calls cell site simulators deployed on airplanes “DRT boxes” or “dirtboxes”, after their manufacturer, Digital Receiver Technology, Inc. (DRT). (Other cell site simulator models, produced by Harris Corporation, are the “Stingray," “Triggerfish,” “Kingfish,” and “Hailstorm”). Continue>>>