CAPTCHAs, the good, the bad and the ugly
Ivan Flechais ( SEP )
- 14:00 30th October 2009 ( week 3, Michaelmas Term 2009 )479
CAPTCHAs (Completely Automated Public Turing Test To Tell
Computers and Humans Apart) are finding their way into a vast number
of online services. They are typically used to stem the flow of
automated bots signing up for services or spreading spam in online
forums, and the variety of CAPTCHAs on offer is ever growing. The
question is, however, does using a hard artificial intelligence
problem as the basis for distinguishing people from computers actually
address the problem, or is it simply the easy way out for service
providers? This talk will provide a light hearted exploration of
CAPTCHAs and the issues that surround them, and hopefully generate
some discussion about the possible alternatives.
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