Unverified50% confidenceFactExact time
The core idea of CAPTCHA is to design tasks that are easy for humans but difficult for programs, such as recognizing distorted text, clicking on images, and dragging sliders; modern schemes also combine browser fingerprints, mouse trajectories, IP reputation, and other signals for frictionless scoring.
1
Sources
50%
Confidence
Long-term
Relevance
10/19/2026
First Seen
Sources
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