Can CAPTCHA Using TTF & GD be installed in check out?

On my 2 other web sites, not using Zen Cart, they have CAPTCHA installed at checkout where the credit card information is entered. It prevents multiple credit card declines/fraud attempts that would create a lot of Authorize.net processing fees. It was installed after I had someone, in Africa according to the police, do this thousands of times in a couple days and cost me hundreds of dollars in fees. Can the CAPTCHA Using TTF & GD module be installed in the Zen Cart check out for this purpose?