This article contains information about what CAPTCHA is.

CAPTCHA: Telling Humans and Computers Apart Automatically

A CAPTCHA is a program that protects websites against bots by generating and grading tests that humans can pass but current computer programs cannot. For example, humans can read distorted text as the one shown below, but current computer programs can't more information located at http://www.captcha.net/

Last Updated: 31st of May, 2011     Article ID: 841

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