this image is not available
Media Platforms Design Team

According to a major report just published in the Wall Street Journal, a secret U.S. government program has been spying on Americans' phones and collecting their data by using fake cell towers—flying fake cell towers, actually.

The audacious scheme involves officials from the U.S. Marshals Service flying over America in small Cessa aircraft that carry so-called "dirtboxes" built by Boeing. The devices mimic cell towers and trick a person's phone into reporting its registration data.

The Justice Department refuses to confirm or deny the existence of the program, but the Journal says the devices, which are about two feet square, allow the government to collect data from tens of thousands of phones during each flight. The paper's sources said these flights happen "on a regular basis."

Says the Journal:

The program is the latest example of the extent to which the U.S. is training its surveillance lens inside the U.S. It is similar in approach to the National Security Agency's program to collect millions of Americans phone records, in that it scoops up large volumes of data in order to find a single person or a handful of people. The U.S. government justified the phone-records collection by arguing it is a minimally invasive way of searching for terrorists.

In response to the massive Edward Snowden NSA leaks, many tech companies said they would not cooperate so easily with the government's attempts to collect data on American citizens. But your fancy new phone won't do any good against this dragnet:

Cellphones are programmed to connect automatically to the strongest cell tower signal. The device being used by the U.S. Marshals Service identifies itself as having the closest, strongest signal, even though it doesn't, and forces all the phones that can detect its signal to send in their unique registration information. Even having encryption on one's phone, such as Apple Co. 's iPhone 6 now includes, doesn't prevent this process.

Read the full report at the WSJ.

Headshot of Andrew Moseman
Andrew Moseman
Site Director

Andrew's from Nebraska. His work has also appeared in Discover, The Awl, Scientific American, Mental Floss, Playboy, and elsewhere. He lives in Brooklyn with two cats and a snake.