CATCHA was Re: Erlang port to the Java Virtual Machine

Yariv Sadan <>
Fri Jun 2 02:51:21 CEST 2006


On 6/1/06, Richard A. O'Keefe <> wrote:
> Before deploying CAPTCHAs, please *do* think carefully about the
> fact that some real genuine entirely innocent human beings cannot
> cope with them.  For blocking entry to a collection of photographs,
> it might make sense to use a technique that the blind and partially
> sighted can't even see let alone solve; for other things there are
> humane reasons not to use them.  You might even want to consider
> legal advice about whether shutting the disabled out is legal in
> your country.
>

Yes, you are making a very important point. It didn't even occur to me
earlier as I was just thinking about the technical challenge of using
CAPTCHAs with Yaws. Do you know of an alternative solution for
blocking automated spam bots while being usable by the blind?

Regards,
Yariv



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