 Short for Completely Automated Public Turing test to tell Computers and Humans Apart, CAPTCHA is a type of protection that easily identifies humans from computers. A commonly used CAPTCHA is an image that is distorted that contains text that is easy for humans to read but difficult or impossible for computers to read. The image to the right is an example of a CAPTCHA.In the above example, a user can easily identify and type in that the image shows "KDEY"; without this information being entered into the web page, a user would be unable to continue. Unfortunately however blind or hard of seeing visitors often encounter issues with CAPTCHA's because of the inability to read the letters shown in the
image. To help allow these users to still gain access to pages some companies are also now incorporating audible CAPTCHA's that will read the letters aloud to the user. Also see: AI, Test | |
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