Re: Captchas – Understanding CAPTCHA-solving services in an economic context

Proceedings of the 19th USENIX Security Symposium

Volumn , Issue , 2010, Pages 435-452

  Motoyama, Marti ^a   Levchenko, Kirill ^a   Kanich, Chris ^a   McCoy, Damon ^a   Voelker, Geoffrey M ^a   Savage, Stefan ^a  

^a UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

COMMERCE; ELECTRONIC MAIL FILTERS;

HIGH PROBABILITY; HUMAN LABOR; LABOR MARKETS; MARKET PRICE; PRICE-PERFORMANCE; REVERSE TURING TEST; SERVICE PROVIDER; WEB RESOURCES;

NETWORK SECURITY;

EID: 85076285223     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (26)

1. BBC news PC stripper helps spam to spread. http://news.bbc.co.uk/2/hi/technology/7067962.stm.
2. Ticketmaster, LLC v. RMG Technologies, Inc., et al 507 F.Supp.2d 1096 (C.D. Ca., October 16, 2007).
3. E. Bursztein, S. Bethard, J. C. Mitchell, D. Jurafsky, and C. Fabry. How good are humans at solving CAPTCHAs? a large scale evaluation. In IEEE S&P’10, 2010.
4. M. Chew and D. Tygar. Image recognition CAPTCHAs. In Information Security, 7th International Conference, ISC 2004, pages 268–279. Springer, 2004.
5. D. Danchev. Inside India’s CAPTCHA solving economy. http://blogs.zdnet.com/security/?p= 1835, 2008.
6. D. Danchev. Report: Google’s reCAPTCHA flawed. http://blogs.zdnet.com/security/?p=5123, 2009.
7. R. Datta, J. Li, and J. Z. Wang. Exploiting the Human-Machine Gap in Image Recognition for Designing CAPTCHAs. IEEE Transactions on Information Forensics and Security, 4(3):504–518, 2009.
8. M. Egele, L. Bilge, E. Kirda, and C. Kruegel. CAPTCHA Smuggling: Hijacking Web Browsing Sessions to Create CAPTCHA Farms. In The 25th Symposium On Applied Computing (SAC), pages 1865–1870. ACM, March 2010.
9. J. Elson, J. R. Douceur, J. Howell, and J. Saul. Asirra: a CAPTCHA that exploits interest-aligned manual image categorization. In CCS’07, pages 366–374, New York, NY, USA, 2007. ACM.
10. C. Fleizach, M. Liljenstam, P. Johansson, G. M. Voelker, and A. Méhes. Can You Infect Me Now? Malware Propagation in Mobile Phone Networks. In Proceedings of the ACM Workshop on Recurring Malcode (WORM), Washington D.C., Nov. 2007.
11. A. Hindle, M. W. Godfrey, and R. C. Holt. Reverse Engineering CAPTCHAs. In Proc. of the 15th Working Conference on Reverse Engineering, pages 59–68, 2008.
12. L. Jassin-O’Rourke Group. Global Apparel Manufacturing Labor Cost Analysis 2008. http://www.tammonline.com/files/GlobalApparelLaborCostSummary2008.pdf, 2008.
13. R. F. Jonell Baltazar, Joey Costoya. The heart of KOOBFACE: C&C and social network propagation. http://us.trendmicro.com/us/trendwatch/research- and-analysis/white-papers-and-articles/, October 2009.
14. C. Kanich, C. Kreibich, K. Levchenko, B. Enright, G. M. Voelker, V. Paxson, and S. Savage. Spamalytics: an empirical analysis of spam marketing conversion. In CCS ’08, pages 3–14, New York, NY, USA, 2008. ACM.
15. The Klingon language institute. http://www.kli.org, Accessed February 2010.
16. G. Mori and J. Malik. Recognizing objects in adversarial clutter: Breaking a visual CAPTCHA. In CVPR, volume 1, pages 134–141, 2003.
17. G. Moy, N. Jones, C. Harkless, and R. Potter. Distortion estimation techniques in solving visual CAPTCHAs. pages II: 23–28, 2004.
18. PWNTcha. Pretend We’re Not a Turing computer but a human antagonist. http://caca.zoy.org/wiki/ PWNtcha.
19. G. Sauer, H. Hochheiser, J. Feng, and J. Lazar. Towards a universally usable CAPTCHA. In SOUPS’08, 2008.
20. Symantec. A captcha-solving service. http://www.symantec.com/connect/blogs/captchasolving-service.
21. L. von Ahn, M. Blum, N. J. Hopper, and J. Langford. Captcha: Using hard AI problems for security. In Advances in Cryptology - EUROCRYPT, 2003.
22. S.-Y. Wang, H. S. Baird, and J. L. Bentley. CAPTCHA challenge tradeoffs: Familiarity of strings versus degradation of images. In ICPR’06, 2006.
23. J. Wilkins. Strong captcha guidelines v1.2. http://bitland.net/captcha.pdf.
24. Xrumer. http://www.botmasternet.com/.
25. J. Yan and A. S. El Ahmad. A low-cost attack on a Microsoft CAPTCHA. In CCS’08, pages 543–554, New York, NY, USA, 2008. ACM.
26. J. Yan and A. S. El Ahmad. Usability of CAPTCHAs or usability issues in CAPTCHA design. In SOUPS’08, pages 44–52, New York, NY, USA, 2008. ACM.