Article:
  Securing Web Forms with PEAR's Text_CAPTCHA
Subject:   Visually impaired people
Date:   2005-04-15 01:38:43
From:   riffraff
why people keep suggesting using a messed up image to check if people are real or bots?


What about the people that can't see well? I mean, we have accessibility guidelines suggesting we put an alt text on every image and then we cut out from a service all the blind and visually impaired people?


PS
I think reusing the same file at every access causes a classical race condition, but I may be wrong..

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  • Visually impaired people
    2008-06-13 23:37:23  miguel.garcia [View]

    In the case of Visually impaired people many websites use sound for validation, so, the user must type what he hear.

    I think you are right with the race condition, a possible solution is to use a .php file as the source of the image and in that file generate the image with the Text_Captcha and echo it.