Why does moving the slider at a uniform speed or too quickly also lead to failure? This happens because DataDome analyzes characteristics such as mouse acceleration and movement angles. If these characteristics significantly deviate from those of a genuine human trajectory, the action will be judged as non-human and result in failure.
DataDome's Characteristics
DataDome is designed to identify and block sophisticated bots that mimic human behavior. It provides real-time protection and reacts within milliseconds. While it effectively intercepts automated threats, it ensures a seamless experience for legitimate users.
Analysis of the Reasons
When the slider is moved at a uniform speed, DataDome examines the mouse velocity and movement path. Genuine users rarely drag items at a perfectly constant speed due to factors like natural hand tremors, slight mouse stutters, or minor adjustments. Uniform movement is essentially too stable and deviates from typical human behavior patterns. If uniform movement is detected, it is likely to be flagged as bot activity.
Similarly, very fast dragging can also lead to failure if it is both excessively rapid and perfectly accurate without any imperfections. Such an overly smooth and flawless trajectory does not match the behavior of a real user.
Rapid dragging contradicts the natural reaction patterns of human users. When a slider CAPTCHA appears, a real user needs a moment to visually process it and react, introducing a natural delay. Instantaneous, extremely fast movement goes against this habitual human response. Furthermore, real human interaction involves numerous unpredictable elements and minor variations. These factors ensure that the generated mouse movement path is never a perfectly smooth and continuous line. Consequently, DataDome's detection mechanisms trigger, resulting in a failed verification.