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Chimera CAPTCHA: A Proposal of CAPTCHA Using Strangeness in Merged Objects

  • Masahiro Fujita
  • Yuki Ikeya
  • Junya Kani
  • Masakatsu NishigakiEmail author
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 9190)

Abstract

In this paper, we propose “Chimera CAPTCHA” that requests users to select only a chimera object, merged from two 3D objects, in a question image, which consists of some 3D objects and the chimera object. The Chimera CAPTCHA is easy for humans to solve because chimera objects, whose appearance are different from ones judged by common sense, cause a feeling of strangeness. Usability survey suggests that the correct response rate is 90.5 % and the average response time is about 5.7 s. In addition, the CAPTCHA system is able to generate questions countlessly and easily by using 3DCG technologies. We also describe threats to its security.

Keywords

CAPTCHA A feeling of strangeness Automatic generation 3DCG 

References

  1. 1.
    The Official CAPTCHA Site. http://www.captcha.net
  2. 2.
    Elson, J., Douceur, J., Howela, J., Saul, J.: Asirra: a CAPTCHA that exploit interest aligned manual image categorization. In: 2007 ACM CSS, pp. 366–374 (2007)Google Scholar
  3. 3.
  4. 4.
    PWNtcha-Captcha Decoder. http://caca.zoy.org/wiki/PWNtcha
  5. 5.
    Yan, J., Ahmad, A.S.E.: Breaking visual CAPTCHAs with naïve pattern recognition algorithms. In: 2007 Computer Security Applications Conference, pp. 279–291 (2007)Google Scholar
  6. 6.
    TechnoBabble Pro: How they’ll break the 3D CAPTCHA. http://technobabblepro.blogspot.jp/2009/04/how-theyll-break-3d-captcha.html
  7. 7.
    Chellapilla, K., Larson, K., Simard, P., Czerwinski, M.: Computers beat humans at single character recognition in reading-based human interaction. In: The 2nd Conference on Email and Anti-Spam (2005)Google Scholar
  8. 8.
    Yamamoto, T., Tygar, J.D., Nishigaki, M.: CAPTCHA using strangeness in machine translation. In: The 24th International Conference on Advanced Information Networking and Applications, pp. 430–437 (2010)Google Scholar
  9. 9.
    Yamamoto, T., Suzuki, T., Nishigaki, M.: A proposal of four-panel cartoon CAPTCHA. In: The 25th International Conference on Advanced Information Networking and Applications, pp. 159–166 (2011)Google Scholar
  10. 10.
    D’Souza, D., Polina, P.C., Yampolskiy, R.V.: Avatar CAPTCHA: telling computers and humans apart via face classification. In: 2012 IEEE International Conference on Electro/Information Technology, pp. 1–6 (2012)Google Scholar
  11. 11.
    Mori, M., MacDorman, K.F., Kageki, N.: The uncanny valley. IEEE Robot. Autom. Mag. 19(2), 98–100 (2012)CrossRefGoogle Scholar
  12. 12.
    Korayem, M., Moharmed, A.A., Crandall, D., Yampolskiy, R.V.: Solving avatar CAPTCHAs automatically. In: 2012 International Conference on Advance Machine Learning Technologies and Applications, pp. 102–110 (2012)Google Scholar
  13. 13.
    Ueda, M.: Shin Kobo-chan 8, Houbunsha (2006). (in Japanese)Google Scholar
  14. 14.
    Kani, J., Suzuki, T., Uehara, A., Yamamoto, T., Nishigaki, M.: Four-panel cartoon CAPTCHA. IPSJ J. 54(9), 2232–2243 (2013). (in Japanese)Google Scholar

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Masahiro Fujita
    • 1
  • Yuki Ikeya
    • 1
  • Junya Kani
    • 1
  • Masakatsu Nishigaki
    • 1
    Email author
  1. 1.Graduate School of InformaticsShizuoka UniversityHamamatsuJapan

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