The brief presents HUMAN Challenge, a user-friendly verification tool that replaces traditional CAPTCHAs with a simple “press and hold” interaction. It uses dynamic proof-of-work and machine learning to detect advanced bots while remaining invisible to 99.99 percent of real users. With a 0.01 percent false positive rate, it delivers 4–6x faster solve times and 3–5x higher retention than reCAPTCHA. Data from challenges continuously improve detection accuracy through adaptive learning. Accessible and customizable, it supports 27 languages, meets ADA and WCAG 2.2 standards, and integrates with mobile SDKs to protect digital experiences across web and app environments.

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