I have created a graphical version of the math CAPTCHA based on the Image CAPTCHA submodule, which I propose to be made a part of the CAPTCHA module. It is easy to use, its configuration almost the same as the Image CAPTCHA's, and it is harder to crack than both Image CAPTCHA and the orig math CAPTCHA. An image of an example CAPTCHA is uploaded. If you are interested, please contact me.
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