Submitted via IRC for Bytram
Facebook Knows How to Track You Using the Dust on Your Camera Lens
In 2014, Facebook filed a patent application for a technique that employs smartphone data to figure out if two people might know each other. The author, an engineering manager at Facebook named Ben Chen, wrote that it was not merely possible to detect that two smartphones were in the same place at the same time, but that by comparing the accelerometer and gyroscope readings of each phone, the data could identify when people were facing each other or walking together. That way, Facebook could suggest you friend the person you were talking to at a bar last night, and not all the other people there that you chose not to talk to. Facebook says it hasn't put this technique into practice.
[...] Patents filed by Facebook that mention People You May Know show some ingenious methods that Facebook has devised for figuring out that seeming strangers on the network might know each other. One filed in 2015 describes a technique that would connect two people through the camera metadata associated with the photos they uploaded. It might assume two people knew each other if the images they uploaded looked like they were titled in the same series of photos—IMG_4605739.jpg and IMG_4605742, for example—or if lens scratches or dust were detectable in the same spots on the photos, revealing the photos were taken by the same camera.
[...] The technological analysis in some of the patents is pretty astounding, but it could well be wishful thinking on Facebook's part.
Vera Ranieri, an attorney at the Electronic Frontier Foundation who focuses on intellectual property, hasn't reviewed these specific patents but said generally that the U.S. Patent Office doesn't ensure that a technology actually works before granting a patent.
(Score: 2) by Reziac on Tuesday January 08 2019, @06:17AM
Or for Windows, a marvelous tool, JPEGsnoop.
https://www.impulseadventure.com/photo/jpeg-snoop.html [impulseadventure.com]
https://github.com/ImpulseAdventure/JPEGsnoop [github.com]
And there is no Alkibiades to come back and save us from ourselves.