April 05, 2012

reCAPTCHA is a free




reCAPTCHA: The FREE anti-bot service that helps digitize books

reCAPTCHA is a free CAPTCHA service that protects your site against spam, malicious registrations and other forms of attacks where computers try to disguise themselves as a human;


link :: https://developers.google.com/recaptcha/

Using recaptcha with jsp/java

How to use recaptcha4j api


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