Share button may be sharing your browsing history, investigators discover
A new study by researchers at KU Leuven (University of Leuven, Belgium) and Princeton University has revealed a secret method by which websites track users without their consent using a previously undetected cookie-like tracking mechanism embedded in 'share' buttons. About one in 18 of the world's top 1,00,000 websites are breaching users' privacy through this. Using hidden codes, the mechanism gets important information about the user's browser type, graphics card, system fonts and even display properties, according to a statement by KU Leuven. Because this grouping of data is highly likely to be unique for each user, it can be reliably associated to individual users, like a fingerprint. This is called " canvas fingerprinting ". Once a website has determined a device's fingerprint, it can easily recognize the user on subsequent site visits, much in the same way cookies do. But while unwanted cookies can be flagged or b...