It’s a form of challenge-response authentication, where a user must answer a question or solve a puzzle in order to be verified and gain access to an online account. At the most basic level, a CAPTCHA is a computer-generated security flow meant to distinguish real users from automated web traffic like bots. What is a CAPTCHA?ĬAPTCHA stands for Completely Automated Public Turing Test to Tell Computers and Humans Apart. In this guide, we explain exactly what CAPTCHA is, how it works, and how modern authentication providers are adapting the CAPTCHA system to keep up with evolving cyber threats - and stop malevolent bots in their tracks. Specifically, modern CAPTCHAs can help apps and websites tell the difference between the good, human users they want to let in and the bad, non-human users (namely, bots) they want to keep out. How CAPTCHA enables apps and websites to differentiate between human users and automated internet traffic like bots.ĬAPTCHA flows have long provided an essential security tool for developers as they work to protect their platforms and users from cyber attacks.
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