funtcha

FuntchasHave Fun. Not Spam.

Kathrin Dentler, Nicolas Höning

The Turing Test

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Today: Captchas• Completely Automated Public Turing test

to tell Computers and Humans Apart

• ‘reverse Turing Test’

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Alternatives?

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All work and no play...

• today’s approaches make users repeat themselves

• approx 150,000 man hours a day

• arms race (e.g. cruder letters in Captchas) leads to bad accessibility

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Captchas will be solved

• A lot are already solved

• http://sam.zoy.org/pwntcha

• Image recognition makes great advances

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Captchas should ...

• 1. be fun, not work

• 2. not be solvable anytime soon

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Funtcha• FUNny Turing test to tell Computers and

Humans Apart

• the idea: let a community of humans create riddles - let the people define how they want to be tested

• 1. humans like surprises

• 2. machines do not

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A Funtcha

• question

• image

• answer (1 word)

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Usage

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Deliver fitting Funtchas

• they should fit the user

• they should have worked before

• this should cost the user minimal effort (remember: the goal is to have fun)

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Deliver fitting Funtchas

• We learn how solvable a Funtcha is

• Users can demand a different Funtcha (express dislike)

• We use tagging to match users of websites and Funtchas

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Database

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Funtcha Selection

• select candidates based on tag similarity

• sort list according to solved/disliked ratio. give new Funtchas a chance to be highly ranked

• choose one randomly out of the best n Funtchas

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Web Interaction

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Demo

• http://funtcha.net

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Open Issues• Accessibility: Image not a must, also Audio

• Security: SSL, changing filenames, etc.

• Copyrights

• Human Labour

• Personalisation: Creators, Websites

• Numbers

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The End• Thanks for listening. Questions?

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