It can be easily added into existing forms on your Joomla 2.5, 3.x or newer website to provide protection from Spam bots. It can run on almost all web-servers as long as you have PHP installed, and GD support within PHP. SecurImage does everything from generating the CAPTCHA images to validating the typed code. Audible codes can be streamed to the browser with Flash for the vision impaired.

Features:

• Works with Joomla Registration and any other extensions that is compatible with Joomla captcha plugin system;
• Works with Contact Enhanced, iRecommend, Ajax Recommend and Ajax Contact;
• Customizable code length, character sets, and Unicode support;
• TTF font support. You can choose the font you want to use;
• Very easy to customize colors;
• Easily add background images;
• Easily add signature to images;
• Several security features such as image distortion, random lines, and noise;
• Flash button to stream audible codes in WAV format;
• Ability to use a word list; Add a word list in your language to /plugins/captcha/securimage/lib/words/
• Display alphanumeric captchas, or simple math problems;
• Highly customizable!