Companies Have a Tricky New Way to Track Your Movement Across the Web

Researchers at Princeton and Belgium's KU Leuven Have Uncovered a New Web-Tracking Method that's Nearly Impossible to Block. It's Called "Canvas Fingerprinting" and Can Potentially Follow Users between Sites Even if they've Disabled More Conventional Methods like Cookies and Aren't Logged into Facebook. Instead, the Tactic Works by Asking the Browser to Draw a Hidden Image and Using that Image to Track the Unique Properties of the Browser. Researchers Found the Tactic being Used on 5% of the Top 1,000 Websites on the Internet, including Whitehouse.gov, YouPorn, The Blaze and the Official Website for the State of California.


The Source behind the Fingerprinting May be AddThis, a Suite of Plug-In Share Tools that is Found on Many of the Named Sites. AddThis has been Testing Canvas Fingerprinting on Certain Websites as Part of the Company's Broader Search for Alternatives to Cookie Tracking. It's still Unclear How Effective the Tactic, with One Survey Only Showing a 90% Success Rate and AddThis Says the Fingerprinting Trials May Soon End since the Results are "not uniquely identifying enough". Still, as Concerns over Web Privacy Grow, it's a Reminder that Simply Blocking Cookies May Not be Enough.




Info Sources:

https://securehomes.esat.kuleuven.be/~gacar/persistent/the_web_never_forgets.pdf

http://www.propublica.org/article/meet-the-online-tracking-device-that-is-virtually-impossible-to-block