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A captcha (/ ˈkæp.tʃə / KAP-chə, originally the acronym CAPTCHA) [1][2][3][4] is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam. [5]
reCAPTCHA Inc.[1] is a CAPTCHA system owned by Google. It enables web hosts to distinguish between human and automated access to websites. The original version asked users to decipher hard-to-read text or match images. Version 2 also asked users to decipher text or match images if the analysis of cookies and canvas rendering suggested the page ...
CAPTCHA is a form of reverse Turing test. Before being allowed to perform some action on a website, the user is presented with alphanumerical characters in a distorted graphic image and asked to type them out. This is intended to prevent automated systems from being used to abuse the site.
Call live aol support at. 1-800-358-4860. Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more. Fix issues with AOL Mail image challenges. AOL Mail uses many security measures to keep your account secure, one of which is CAPTCHA or image challenges when sending mail.
The term "reverse Turing test" has also been applied to a Turing test (test of humanity) that is administered by a computer. In other words, a computer administers a test to determine if the subject is or is not human. Such procedures, called CAPTCHAs, are used in some anti- spam systems to prevent automated bulk use of communications systems.
Challenge–response authentication. In computer security, challenge-response authentication is a family of protocols in which one party presents a question ("challenge") and another party must provide a valid answer ("response") to be authenticated. [1]
TypeRacer restricts the use of cheats with measures such as keystroke replays and a captcha anticheat [14] that requires users who achieve over 100 wpm in a race to complete a CAPTCHA. When completed successfully, if high-scoring players achieve a score that is 25% higher than their recorded CAPTCHA speed, an additional challenge-response test ...
Identify possible conditions and treatment related to your symptoms. This tool does not provide medical advice. NEW: This symptom checker now includes the ability to select symptoms by body location. We hope this makes it easier for you to identify your symptoms and possible conditions. The tool also allows you to select multiple symptoms quickly.
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