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A CAPTCHA or Captcha (pronounced /ˈkæptʃə/) is a type of challenge-response test used in computing to ensure that the response is not generated by a computer. The process usually involves one computer (a server) asking a user to complete a simple test which the computer is able to generate and grade. Because other computers are unable to solve the CAPTCHA, any user entering a correct solution... Read enhanced Wikipedia article

Factz from Wikipedia: we found the following about CAPTCHA  

focus on :
segment and segmentation.

Results for "CAPTCHA focus on segment"

CAPTCHA A modern CAPTCHA, rather than attempting to create a distorted background and high levels of warping on the text, might focus on making segmentation difficult by adding an angled line

Results for "CAPTCHA focus on segmentation"

CAPTCHA Hence, an effective CAPTCHA should focus on the segmentation.

rely on on :
problems and perception.

Results for "CAPTCHA rely on on problems"

CAPTCHA Instead, CAPTCHAs rely on difficult problems in artificial intelligence.

Results for "CAPTCHA rely on on perception"

CAPTCHA Because CAPTCHAs rely on visual perception, users unable to view a CAPTCHA (for example, due to a disability or because it is difficult to read) will be unable to perform the task protected by a CAPTCHA.

prevented :
bot and use.

Results for "CAPTCHA prevented bot"

CAPTCHA Primitive CAPTCHAs seem to have been developed in 1997 by Andrei Broder, Martin Abadi, Krishna Bharat, and Mark Lillibridge to prevent bots from adding URLs to their search engine.

Results for "CAPTCHA prevented use"

Reverse Turing test As of 2004, such procedures, called captchas, are used in some anti-spam systems to prevent automated bulk use of communications systems.

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Wikipedia Articles

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    CAPTCHA

    A CAPTCHA or Captcha (pronounced /ˈkæptʃə/) is a type of challenge-response test used in computing to ensure that the response is not generated by a computer. The process usually involves one computer (a server) asking a user to complete a simple test which the computer is able to generate and grade.
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    List of computing and IT abbreviations

    This is a list of computing and IT acronyms and abbreviations. ... CAPTCHA — Completely Automated Public Turing Test to tell Computers and Humans Apart
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    Micro CMS

    Micro CMS is small and friendly, but also modern CMS and MVC framework written in PHP. ... JavaScript captcha
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    CryptLoad

    CryptLoad is a freeware download manager supported by Microsoft Windows operating systems that downloads files from file-hosting websites such as RapidShare and Megaupload. ... Captcha recgonition
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    Tucan Manager

    Tucan Manager is an upload and download manager software for One-click hosting services. ... It offers also CAPTCHA recognition by using the Tesseract software.
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    Sputnik (software)

    The Sputnik Wiki is a lightweight, cross-platform example of the wiki software application type. ... Plugins via LuaRocks (Markup, Storage, Authentication/CAPTCHA, etc.)
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    reCAPTCHA

    reCAPTCHA is a system originally developed at Carnegie Mellon University that uses CAPTCHA to help digitize the text of books while protecting websites from bots attempting to access restricted areas. On September 16, 2009, Google acquired reCAPTCHA. reCAPTCHA is currently digitizing the archives of the New York Times.
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    Badongo

    Badongo is a one-click hosting (and file hosting) service, based in the USA. ... No captcha and no waiting time
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    Google search

    Google search is a web search engine owned by Google Inc. and is the most-used search engine on the Web. ... sometimes followed by a CAPTCHA prompt.
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    List of Guatemalans

    This is a list of Guatemalans who are famous or notable. ... Luis von Ahn, computer scientist, creator of CAPTCHA technlogy, professor of Carnegie Mellon University.

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