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  2. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    An example of a reCAPTCHA challenge from 2007, containing the words "following finding". The waviness and horizontal stroke were added to increase the difficulty of breaking the CAPTCHA with a computer program. A CAPTCHA usually has a text box directly underneath where the user should fill out the text that they see. In this case, "sclt ..was ...

  3. reCAPTCHA - Wikipedia

    en.wikipedia.org/wiki/ReCAPTCHA

    An example of how reCAPTCHA challenges were presented in 2010, [29] containing the words "and chisels" The main purpose of a CAPTCHA system is to block spambots while allowing human users. On December 14, 2009, Jonathan Wilkins released a paper describing weaknesses in reCAPTCHA that allowed bots to achieve a solve rate of 18%. [30] [31] [32]

  4. From CAPTCHA to catastrophe: How fake verification ... - AOL

    www.aol.com/captcha-catastrophe-fake...

    The fake CAPTCHA scam shows how messy the internet’s ad system has become, with everyone involved passing the buck. Guardio Labs points to ad networks like Monetag as a big part of the problem.

  5. Huh? We Never Would Have Guessed What 'CAPTCHA ... - AOL

    www.aol.com/huh-never-guessed-captcha-actually...

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  6. Internet bot - Wikipedia

    en.wikipedia.org/wiki/Internet_bot

    The most widely used anti-bot technique is CAPTCHA. Examples of providers include Recaptcha, Minteye, Solve Media and NuCaptcha. However, captchas are not foolproof in preventing bots, as they can often be circumvented by computer character recognition, security holes, and outsourcing captcha solving to cheap laborers. [citation needed]

  7. 80 Acronym Examples You Should Know - AOL

    www.aol.com/50-acronym-examples-texting...

    80 Acronym Examples You Should Know. Kelly Kuehn. July 6, 2021 at 8:30 AM ... CAPTCHA. Completely Automated Public Turing Test to tell Computers and Humans Apart. CD-ROM. Compact Disc Read-Only ...

  8. Human presence detection - Wikipedia

    en.wikipedia.org/wiki/Human_presence_detection

    reCAPTCHA is a CAPTCHA-like system designed to establish that a computer user is human (normally in order to protect websites from bots) and, at the same time, assist in the digitization of books. A sensor based on a piezoelectric film (EMFI sensor) is used to detect mechanical vibrations and the presence of a person seated on the rear bench of ...

  9. Luis von Ahn - Wikipedia

    en.wikipedia.org/wiki/Luis_von_Ahn

    The most famous example is the ESP Game, [21] an online game ... In 2007, von Ahn invented reCAPTCHA, [24] a new form of CAPTCHA that also helps digitize books.