CAPTCHA

From Wikipedia, the free encyclopedia
Jump to: navigation, search
spacer
A ReCAPTCHA CAPTCHA

A CAPTCHA is a test that is used to separate humans and machines. CAPTCHA stands for "Completely Automated Public Turing test to tell Computers and Humans Apart." It is normally an image test or a simple mathematics problem which a human can read or solve, but a computer cannot. It is made to stop computer hackers from using a program to automatically set up hundreds of accounts, such as email accounts. It is named after mathematician Alan Turing's Turing test.[1]

References[change | change source]

  1. "A word is born" (in English). Reader's Digest (Australia: Reader's Digest) 176 (1054): 165. February 2010.
spacer Wikimedia Commons has media related to: Captcha
spacer This short article about technology can be made longer. You can help Wikipedia by adding to it.
Retrieved from "simple.wikipedia.org/w/index.php?title=CAPTCHA&oldid=4261721"