Canvas Fingerprinting is a novel tracking system used on thousands of websites which monitors what users do online by exploiting features of a page’s underlying code. The system forces a web browser to create a unique hidden image based on the computer/device’s individual setup in order to identify the user consistently.
Canvas Fingerprinting is very hard to detect and control, causing frustration for tools designed to prevent online tracking due to the advanced and resilient nature it has towards being blocked or removed. The system is used on many popular websites such as government portals, online shops and pornographic sites, including The Whitehouse and San Francisco Chronicles.
Despite the growth in popularity, the fingerprinting method designed purely as a beta test in order to decide whether there were better options available, however has been said that sites will soon remove it due to not being uniquely identifying enough.