Facebook Knows How to Track You Using the Dust on Your Camera Lens


#1

“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.”


#2

This sounds similar to old-school police techniques like blood spatter analysis.