Fighting Canvas Fingerprint Forgery: Detection Methods and the Arms Race

Canvas fingerprinting is commonly used for anti-fraud, but fraudsters have developed techniques to bypass detection. This post delves into how fraudsters utilize techniques from platforms like Zenrows and browser extensions such as Canvas Blocker to modify canvas fingerprints. Two detection methods are analyzed: pixel value verification and function consistency checks to identify forgery. These methods verify preset pixel colors and check native function prototypes or error stack traces to determine if a canvas fingerprint has been tampered with.