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  1. CAPTCHA - Wikipedia

    CAPTCHAs do not have to be visual. Any hard artificial intelligence problem, such as speech recognition, can be used as CAPTCHA. Some implementations of CAPTCHAs permit users to …

  2. reCAPTCHA | Google for Developers

    reCAPTCHA v3 helps you detect abusive traffic on your website without user interaction. Instead of showing a CAPTCHA challenge, reCAPTCHA v3 returns a score so you can choose the …

  3. How CAPTCHAs work | What does CAPTCHA mean? - Cloudflare

    What is a CAPTCHA? A CAPTCHA test is designed to determine if an online user is really a human and not a bot. CAPTCHA is an acronym that stands for "Completely Automated Public …

  4. The Official CAPTCHA Site

    CAPTCHA: Telling Humans and Computers Apart Automatically A CAPTCHA is a program that protects websites against bots by generating and grading tests that humans can pass but …

  5. What is CAPTCHA code - GeeksforGeeks

    Jul 15, 2025 · CAPTCHA is a strategy used to ensure sites against spam. The objective is to prevent intuitive sites from being spammed by sifting through naturally created input. The …

  6. CAPTCHA: Meaning, Types & How They Work - Okta

    Sep 14, 2024 · We've all encountered CAPTCHA at least once as we've scrolled through websites and attempted to fill out forms. Anything that involves solving a puzzle or passing a …

  7. What Is CAPTCHA? Meaning, Definition, Types & Uses | Fortinet

    CAPTCHA (Completely Automated Public Turing Test To Tell Computers and Humans Apart) is a system designed to differentiate between human visitors to a website and robotic agents. …

  8. What Is a CAPTCHA Code? - Lifewire

    Sep 30, 2021 · CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a human response test used to prevent spam on websites.

  9. how to enter captcha correctly

    CAPTCHA is a critical tool in maintaining online security, but it can be a source of frustration for many users. By understanding the different types of CAPTCHA and following the steps …

  10. CAPTCHA: What It Is, How to Solve It, and Why It Matters

    Feb 11, 2025 · In simpler terms, it's a test designed to determine whether the user is a human or a bot. Websites use CAPTCHA to prevent spam, protect against automated attacks, and …