Ideal - Custom Software Development

	Compatibility:
	Type
	Version:	1.5.19 1.7.2
	Cost:	FREE

Multiple CAPTCHA Engine is a system plugin to produce and verify captcha images.

With this new version, you will get 3 different captcha systems:

1. SecurImage PHP library (requires GD image Library),
2. ReCAPTCHA (requires an API key from recaptcha.net);
3. MathGuard, simple but effective.
4. VouchSafe;

This plugin is meant to work with Contact Enhanced (has the latest version built-in), Ajax Contact and Ajax Recommend only;

Examples

SecurImage

SecurImage 2

ReCAPTCHA

MathGuard

Security question
6 + 3 =

CHANGELOG

-- Version 1.5.6 - 19/October/2009

# Changed PHP short <? tag for full tag <?php, which was causing errors under some server configurations.

-- Version 1.5.5 - 11/September/2009

# Fixed: Wrong code were been validated under some server configuration, which are now fixed

-- Version 1.5.3 - 23/June/2009

^ Added ReCAPTCHA and MathGuard

-- Version 1.5.2 - 22/April/2009

# removed all php notices

How to download

This is a free extension, to download it go to our Download section, and download your extension from there.

A CAPTCHA is a type of challenge-response test used in computing to ensure that the response is not generated by a computer. The process usually involves one computer (a server) asking a user to complete a simple test which the computer is able to generate and grade. Because other computers are unable to solve the CAPTCHA, any user entering a correct solution is presumed to be human. Thus, it is sometimes described as a reverse Turing test, because it is administered by a machine and targeted to a human, in contrast to the standard Turing test that is typically administered by a human and targeted to a machine. A common type of CAPTCHA requires that the user type letters or digits from a distorted image that appears on the screen.

The term "CAPTCHA" (based upon the word capture) was coined in 2000 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper (all of Carnegie Mellon University), and John Langford (then of IBM). It is a contrived acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart." Carnegie Mellon University attempted to trademark the term, but the trademark application was abandoned on 21 April 2008. Currently, CAPTCHA creators recommend use of reCAPTCHA as the official implementation.

 

Integrate this plugin in your extensions

This plugin was made to work with Contact Enhanced and Ajax Recommend however if you are a PHP developer  you can integrate this captcha into your own extensions. If you do not have a good PHP knowledge you can hire us to add this feature to any Joomla! extension.