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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%.

  4. 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]

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

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

    For premium support please call: 800-290-4726 more ways to reach us

  6. Fix issues with AOL Mail image challenges

    help.aol.com/articles/what-should-i-do-if-i-get...

    AOL Mail uses many security measures to keep your account secure, one of which is CAPTCHA or image challenges when sending mail. These challenges exist to make it harder for hackers to access your accounts. The characters can't be read by a computer and must be entered manually, ensuring only a real person can pass the test. Why am I being ...

  7. 80 Acronym Examples You Should Know - AOL

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

    The post 80 Acronym Examples You Should Know appeared first on Reader's Digest. ... CAPTCHA. Completely Automated Public Turing Test to tell Computers and Humans Apart. CD-ROM.

  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. Turing test - Wikipedia

    en.wikipedia.org/wiki/Turing_test

    The CAPTCHA system is commonly used online to tell humans and bots apart on the internet. It is based on the Turing test. Displaying distorted letters and numbers, it asks the user to identify the letters and numbers and type them into a field, which bots struggle to do. [18] [58] The reCaptcha is a CAPTCHA system owned by Google. The reCaptcha ...