What You Need to Know About the Sneakiest New Online Tracking Tool

What do the White House and YouPorn have in common? Their websites both use canvas fingerprinting, a newer form of online tracking designed to make it hard to hide. ProPublica investigated the pervasive shadowing method, developed as an insidious alternative to cookies so websites can keep tabs on where their visitors… » 7/21/14 4:20pm 7/21/14 4:20pm