Comment spam has been driving me nuts. I implemented a blacklist based fliter a while back which stopped a bunch of it, but ever week 100’s of bogus comments got through because the blacklist was not updated fast enough.

So as of last night I have implmented a CATCHPA solution on the comment posting form. CATCHPA stands for “completely automated public Turing test to tell computers and humans apart”. The term “Hip” is also used “Human Interaction Proof”.

© Charlie Kindel. All Rights Reserved.


  1. sorry charlie (intended), that CAPTCHA is easily beaten

    BTW thanks for contributing MCE Controller. works great

  2. http://

    Now using the Clearscreen 1.3 HIP (1.4 doesn’t work). Thanks for the head’s up.

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