In a detailed exploration of CAPTCHA's history and effectiveness, PayPal's Priyanka Aggarwal examines the technology's origin in 1997, its evolution, and the challenges it faces in today's advanced cyber threat landscape. Highlighting that over one-third of the top websites use CAPTCHAs, Aggarwal discusses Google's acquisition and enhancement of the technology, leading to the development of reCAPTCHA v3, which operates invisibly to distinguish between humans and bots without user interaction....