Proof-of-Concept: Favicons Can Be Used as Undeletable Supercookies to Track You Online
https://www.vice.comAccording to a researcher, favicons can be a security vulnerability that could let websites track your movement and bypass VPNs, incognito browsing status, and other traditional methods of cloaking your movement online.
“Supercookie uses favicons to assign a unique identifier to website visitors. Unlike traditional tracking methods, this ID can be stored almost persistently and cannot be easily cleared by the user,” Strehle said on his Github. “The tracking method works even in the browser’s incognito mode and is not cleared by flushing the cache, closing the browser or restarting the system, using a VPN or installing AdBlockers.
