Detecting Noise in Canvas Fingerprinting

In a previous blog post, we talked about canvas fingerprinting, a technique commonly used to detect fraudsters and bots. In this post we'll go deeper on how fraudsters can forge or create fake canvas fingerprints to stay under the radar for typical device fingerprinting techniques. Plus cover some techniques for detecting this. Quick reminder: a canvas fingerprint is a JavaScript challenge that leverages the HTML canvas API to draw different shapes and text. The images drawn are completely invisible to the users since the process happens in the background. Canvas fingerprint is valuable for fraud detection because there exist subtle differences in the rendering of the canvas image depending on your browser and your device (OS, GPU, list of fonts installed). Thus, canvas fingerprints are quite unique and stable, which can be used to keep track of fraudsters, even if they delete their cookies. Moreover, since the canvas values depend on the browser and the OS, it’s helpful to detect us ... Read full article.