What is a CAPTCHA & How CAPTCHAs Work - DataDome
https://datadome.co/guides/captcha/what-is-captcha-and-how-does-it-work/
WebLater versions of CAPTCHA, like Google’s reCAPTCHA, use images and ask users to identify which pictures contain a certain object. Some versions of reCAPTCHA are also “invisible”, but not entirely effective at blocking bots. In fact, all types of traditional CAPTCHAs, including reCAPTCHA, have now been outpaced by many bot developers.
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