The term "CAPTCHA" was created in 2000 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper of Carnegie Mellon University.
CAPTCHA code was created to stop automated computer spam robots from filling out forms, harvesting email addresses, and then sending out countless spam emails.
The CAPTCHA security image works by asking the website visitor to type in a code they see correctly.A human can do this, but an automated computer program cannot.
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