 readme  id readmetxt v 12021 20100705 213721 soxofaan exp readme file for the captcha module for drupal captchamodule is the basic captcha module offering general captcha administration and a simple math challenge submodule imagecaptchamodule offers an image based challenge installation installation is like with all normal drupal modules extract the captcha folder from the tar ball to the modules directory from your website typically sites all modules dependencies the basic captcha module has no dependencies nothing special is required conflicts known issues captcha and page caching do not work together currently however the captcha module does support the drupal core page caching mechanism it just disables the caching of the pages where it has to put its challenges if you use other caching mechanisms it is possible that captcha s won t work and you get error messages like captcha validation error unknown captcha session id configuration the configuration page is at admin user captcha where you can configure the captcha module and enable challenges for the desired forms you can also tweak the image captcha to your liking  