CAPTCHA
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A CAPTCHA is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.
The term was coined in 2003 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper, and John Langford. Wikipedia
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CAPTCHA: Telling Humans and Computers Apart Automatically. A CAPTCHA is a program that protects websites against bots by generating and grading tests that ...
A CAPTCHA is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam. This CAPTCHA ...
CAPTCHA is an acronym that stands for "Completely Automated Public Turing test to tell Computers and Humans Apart." Users often encounter CAPTCHA and reCAPTCHA ...
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CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a type of security measure known as challenge-response ...
CAPTCHA stands for the Completely Automated Public Turing test to tell Computers and Humans Apart. CAPTCHAs are tools you can use to differentiate between real ...
reCAPTCHA uses an advanced risk analysis engine and adaptive challenges to keep malicious software from engaging in abusive activities on your website.
Fastest online captcha solving service starting at just $1 for 1000 captchas. Service supports APIs including PHP, Python, C++, JAVA, C#, and JavaScript, ...
CAPTCHA stands for "completely automated public Turing test* to tell computers and humans apart." It refers to various authentication methods that validate ...
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse. A “CAPTCHA” is a turing test to tell human and bots apart.
CAPTCHA(Completely Automated Public Turing Test To Tell Computers and Humans Apart) is a system designed to differentiate between human visitors to a ...