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Top / Computers / Internet / Abuse / CAPTCHA /

CAPTCHA: Telling Humans and Computers Apart Automatically Includes demonstrations, research papers, and news. http://www.captcha.net/ Captcha.net  ~   Site Info   Whois   Trace Route   RBL Check   Wikipedia: CAPTCHA Explains how captcha features can keep spammers from signing up for certain accounts online, such as email or weblogs. Explains how the system can be circumvented as well. http://en.wikipedia.org/wiki/CAPTCHA Wikipedia.org  ~   Site Info   Whois   Trace Route   RBL Check   RNIB Web Access Centre Blog: CAPTCHA - If Your Name's Not Down You're Not Coming In Article outlining the accessibility issues with CAPTCHAs, and describing some possible solutions, none of which are found by the authors to be completely satisfactory. http://www.rnib.org.uk/wacblog/images/captcha-if-youre-names-not-down-youre-not-coming-in/ Rnib.org.uk  ~   Site Info   Whois   Trace Route   RBL Check   JCaptcha An open source Java framework for captcha definition and site integration. Project information, documentation, issue tracker, and download. http://jcaptcha.sourceforge.net/ Sourceforge.net  ~   Site Info   Whois   Trace Route   RBL Check   reCAPTCHA A captcha system that uses successful decodings to helps digitise books for online use. Background, and details on how to incorporate into a site. Source code in several languages, and plugins for popular blogging and CMS software. http://recaptcha.net/ Recaptcha.net  ~   Site Info   Whois   Trace Route   RBL Check   Captcha Creator PHP Captcha Script that generates unique captcha images to stop automated submissions, highly customizable, easy to install and configure. http://www.captchacreator.com/ Captchacreator.com  ~   Site Info   Whois   Trace Route   RBL Check   Inaccessibility of CAPTCHA A W3C Working Group Note explaining how CAPTCHAs can present a major obstacle to users who have limited vision or a learning disability such as dyslexia. This document examines a number of potential solutions and alternative systems. http://www.w3.org/TR/turingtest/ W3.org  ~   Site Info   Whois   Trace Route   RBL Check   Securimage Open source PHP script for generating image CAPTCHAs with audio alternatives. Includes documentation, a gallery and an online demonstration. [LGPL] http://www.phpcaptcha.org/ Phpcaptcha.org  ~   Site Info   Whois   Trace Route   RBL Check