I am currently using Authen::Captcha and would like to switch to GD-SecurityImage. You recommend to use GD::SecurityImage::AC. To my understanding this would have the advantage that I still can use Authen's captcha handler functions while the image engine is provided by the new GD-SecurityImage. My question is about installation: Does GD::SecurityImage::AC completely *replace* GD::SecurityImage or do I need to install both modules to make it work (meaning that GD::SecurityImage is needed too)? In case I only need GD::SecurityImage::AC, would there be a high security risk because the latest ...::AC update is quite old, well it has not been updated this year.(released on 1.11 2008)?