| 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. |
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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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| Resolved |
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