What is CAPTCHA, and how does it work?

CAPTCHA, an acronym for "Completely Automated Public Turing Test to Tell Computers and Humans Apart," is a widely used security tool designed to differentiate human users from automated bots by presenting challenges that require sensory and cognitive responses. Despite its simplicity and scalability, CAPTCHA systems face vulnerabilities, such as the rise of CAPTCHA farms where human workers solve puzzles for bots, enabling security breaches. ReCAPTCHA, developed by Luis von Ahn and later acquired by Google, sought to enhance CAPTCHA by utilizing real-world text to aid in digitization projects, but it too faced limitations. To combat CAPTCHA fraud, developers are turning to advanced solutions like Stytch’s Strong CAPTCHA, which eliminates public-key vulnerabilities and integrates seamlessly into authentication flows, thus improving security without compromising user experience.

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