Researchers were able to reconstruct as much as 90% of a user's web activity just from monitoring traffic to ad-trackers like Google's DoubleClick. Crucially, the researchers didn't need any special access to the ad data. They just sat back and watched public traffic across the network.
How Advertising Cookies Let Observers Follow You Across The Web
Monday, April 7, 2014
How Advertising Cookies Let Observers Follow You Across The Web
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