캡차 CAPTCHA

 

캡차(CAPTCHA, Completely Automated Public Turing test to tell Computers and Humans Apart)

캡차, 리캡차, 노캡차 리캡차 ( http://www.bloter.net/archives/214543 )

위키백과 CAPTCHA ( https://ko.wikipedia.org/wiki/CAPTCHA )

구글 리캡차 ( https://www.google.com/recaptcha/intro/index.html )

나무위키 CAPTCHA ( https://namu.wiki/w/CAPTCHA  )

captcha.com (  https://captcha.com/doc/java/howto/jsp-captcha.html  )