How Would You Design a Captcha for the Deaf-Blind?

kesuki asks: "Right now, the state of the art captcha only works for the visually-abled. Some people are trying to start a grass roots opposition to catcha using existing anti-discrimination laws. However, without any captcha at all, spammers would have a field day. Audio captcha would work for the blind, of course, but they still leave out the deaf-blind using brail interpreters to use their computers and navigate the web. What system of captcha can you dream up that would work for the deaf-blind?"

not so great...

[ragnarok]

http://www.google.com/search?q=seven+times+three [google.com]

Re:A phone number

[hoggoth]

> so what happens when spambots start calling that number and trying to convince the operator to give them accounts?

They will fail the simple Turing test given by any operator who asks "how's the weather over there" or "can you believe that game last night?"

It's a person. A human being. How do you suppose a bot is going to do this?

REGISTERBOT: "Hello. I would like to sign up for an account."
OPERATOR: "Ok, No problem. What's your name?"
REGISTERBOT: "John Doe."
OPERATOR: "Hey, my in-laws are named Doe, are you any relation to the Piscataway Does?"
REGISTERBOT: "How does it make you feel when I are you any relation to the Piscataway Does?"