Hi all!

I'm thinking in implement a captcha (http://en.wikipedia.org/wiki/Captcha) protection for web-based authentication. I'm looking in the tomcat surce and the form authentication seems be implemented by org.apache.catalina.authenticator.FormAuthenticator class. But I'm not sure if change this class is the right way.

Are there other better method to do this?
Must I change the FormAutenticator class or must extend it in other class and i can refer to it in the tomcat configuration ?

Thanks in advance and best regards.
Ricardo.



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