Random image text generation?
bignose+hates-spam at benfinney.id.au
Mon Nov 13 00:30:31 CET 2006
Leif K-Brooks <eurleif at ecritters.biz> writes:
> Steven D'Aprano wrote:
> > For a text only solution, consider putting up a natural language
> > question such as:
> > What is the third letter of 'national'?
> > What is four plus two?
> > How many eggs in a dozen?
> > Fill in the blank: Mary had a little ____ its fleece was white as snow.
> > Cat, Dog, Apple, Bird. One of those words is a fruit. Which one?
> That wouldn't work as a true CAPTCHA (Completely Automated *Public*
> Turing test to tell Computers and Humans Apart), since making the
> list of questions and answers public would defeat its purpose.
The "Public" part of a CAPTCHA is the algorithm. The data consumed and
produced by the algorithm don't need to be publicly correlated -- and
indeed shouldn't be, for exactly the reason you state.
\ "To me, boxing is like a ballet, except there's no music, no |
`\ choreography, and the dancers hit each other." -- Jack Handey |
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