[CEUD-ICT] textCAPTCHA

[Alan M. Dalton]

Hi,

Has anybody on this list used textCAPTCHA [1]? It's a service that allows
websites to use logic questions to determine whether their visitors are
humans or computers. Logic questions are obviously more accessible than
visual or audio questions for people with sensory disabilities, but they
could be more difficult for people with intellectual disabilities.

Visual CAPTCHAs that use images of words to determine whether their
visitors are humans or computers are not always successful: some
universities have already shown that computers can get past visual CAPTCHAs
[2].

Interestingly, one blogger has reported a method that spammers can use to
trick humans into helping them to get past CAPTCHAs of all kinds [3].

[1] http://textcaptcha.com/
[2] http://www.cs.sfu.ca/~mori/research/gimpy/
[3] http://www.boingboing.net/2004/01/27/solving-and-creating.html

Regards,
Alan.
_
Alan Dalton
Accessibility Development Advisor for EtA http://www.nda.ie/eta
Access Officer for NDA http://www.nda.ie

Address: National Disability Authority, 25 Clyde Road, Dublin 4.
_


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