Fending off SPAM with reCAPTCHA

August 6, 2010

reCAPTCHA is a free CAPTCHA service that helps to digitize books, newspapers, magazines and all kinds of old publications that can only be found on a printed medium. The term CAPTCHA stands for “Completely Automated Public Turing test to tell Computers and Humans Apart”, and is a type of challenge-response test used in computing...

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