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Funtchas
    Have Fun. Not Spam.




Kathrin Dentler, Nicolas Höning
The Turing Test




       2
3
Today: Captchas
• Completely Automated Public Turing test
  to tell Computers and Humans Apart

• ‘reverse Turing Test’




                          4
5
Alternatives?




      6
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



                       7
Captchas will be solved

• A lot are already solved
• http://sam.zoy.org/pwntcha
• Image recognition makes great advances


                     8
Captchas should ...

• 1. be fun, not work
• 2. not be solvable anytime soon


                      9
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
                      10
A Funtcha

• question
• image
• answer (1 word)


                    11
Usage




        12
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)




                      13
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



                      14
Database




   15
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


                      16
Web Interaction




       17
Demo


• http://funtcha.net



                       18
Open Issues
• Accessibility: Image not a must, also Audio
• Security: SSL, changing filenames, etc.
• Copyrights
• Human Labour
• Personalisation: Creators, Websites
• Numbers
                      19
The End
• Thanks for listening. Questions?




                20

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Funtcha