Forum OpenACS Q&A: Re: Captchas for the register form

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Posted by Orzenil Silva Junior on
Hi César,

Your approach to generate image captchas to openacs forms is very easy to implement. I just downloaded tclmagick simple build from Praganas' website as you suggested and unzipped it inside tcldir in my linux box.

The only additional step i did was create a validation block for ad_form in the tcl page script:

} -validate {captcha_text
{[captcha::validate $captcha_id $captcha_text]}
"Text must match!"
}
}

It works fine!

My only concern with this approach is inaccessibility of image CAPTCHA to users who are blind, have low vision, or have a learning disability such as dyslexia.

My question is: are you working on some kind of alternative to image captchas like audio CAPTCHAs or other? Maybe it could be a good openacs web accessibility project for google summer of code 2007 (see http://www.openacs.org/xowiki/GSoC).

Alternatives to image captchas see this W3C paper:

http://www.w3.org/TR/turingtest/

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Posted by César Clavería on
Thank you for pointing that out, I'm not working right now in anything like that but I think this is an important subject that I left out. And the idea about working on this in the summer of code is pretty good.