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Internet Directory - Top : Computers : Internet : Abuse : CAPTCHA

Top : Computers : Internet : Abuse : CAPTCHA (10 web sites)
 Related Categories
Computers: Internet: Abuse
Computers: Internet: Abuse: Comment_Spam
Computers: Internet: E_mail: Spam: Preventing
 Related Web Pages

3DCaptcha
Open source system that uses spatial cognition abilities of humans to differentiate them from machines.
http://www-personal.umich.edu/%7Emressl/3dcaptcha/

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/

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/

JCaptcha
An open source Java framework for captcha definition and site integration. Project information, documentation, issue tracker, and download.
http://jcaptcha.sourceforge.net/

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/

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

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://www.google.com/recaptcha