What is a CAPTCHA? What types of CAPTCHA are there?
captcha stands for 'completely automated public turing test to tell computers and humans apart'.
Tags : recaptcha
How effective is the 'Non-robot' test on websites?
'i'm not a robot' is a recaptcha version, which uses a lot of clues to determine whether the user trying to access the website is a real human being or a bot.
The origin of CAPTCHA and reCAPTCHA
the word captcha is an abbreviation for 'completely automated public turing test to tell computers and humans apart' (roughly the automatic test for distinguishing computers and
Secrets behind the free program reCAPTCHA: Turn Internet users into 'free workers' to electronically 17,600 books a year
but few know that, behind the free recaptcha program that many people still use every day is a genius business model, turning tens of millions of internet users into typewriters
unCAPTCHA breaks 450 reCAPTCHA in less than 6 seconds
uncaptcha is the name of a new automation system designed by a group of four computer science experts from the university of maryland, capable of breaking google's recaptcha