CAPTCHA = Completely Automated Public Turing test to tell Computers and Humans Apart. Usually used to test the word verification when you login or register (register) as enrolling in email, online forums like kaskus.co.id. And to protect websites against bots by generating and grading tests that humans can pass but current computer programs can not. For example, humans can read distorted text as shown below, but current computer programs can not.
Examples KASKUS CAPTCHA
The term CAPTCHA (for Completely Automated Public Turing Test To Tell Computers and Humans Apart) was coined in 2000 by Luis von Ahn, Manuel Blum, Nicholas Hopper and John Langford of Carnegie Mellon University
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