With an increased focus on privacy thanks to revelations of massive spying by the NSA, computer users are (or should be) increasingly concerned about their security online. Most of us know about cookies, small pieces of data sent from a website and stored in a Web browser. These cookies enable sites to learn information about your location and browsing history. And while a user can disable cookies, a method called device or browser fingerprinting can identify users even without cookies.
This method properties (without relying on cookies) from PCs, smartphones and tablets to identify and track users, even if they enable the “do not track” option.