Hi, This is the presentation which was delivered on Drag and Drop CAPTCHA, in IEEE International Conference Indicon 2009. http://ewh.ieee.org/r10/gujarat/indicon2009/index.html This paper basically displays new approach to CAPTCHA and avoid possible threats against the laundry attacks and OCRs. You can find the Research Paper of IEEE at IEEE Xplore. And for more information check the updates on: http://dndcaptcha.blogspot.com For Educational or technical reason you may directly mail me on desaiguddu@gmail.com

1. Drag and Drop A Better Approach to CAPTCHA A.D.PATEL INSTITUTE OF TECHNOLOGY By: Arpan Desai & Pragnesh Patadia Presented At: IEEE Indicon 2009, DAIICT { arpanvdesai , prpatadia } [at] gmail [dot] com

2. CAPTCHA???..

4. CAPTCHA A PROGRAM THAT CAN TELL WHETHER ITS USER IS A HUMAN OR A COMPUTER

5. Courtesy By: The Newyorker

6. CAPTCHA A. MOST HUMANS CAN PASS B. CURRENT COMPUTER PROGRAMS CANNOT PASS A PROGRAM THAT CAN GENERATE AND GRADE TESTS THAT:

8. HUMAN JUDGE TURING MACHINE CAPTCHA Turing Test Vs. CAPTCHA

10. MAIL SIGNUP

11. URL ADDING

12. ( FROM WWW.SLASHDOT.ORG) QUICKVOTE Which is the best Computer Science Grad School in the US? CMU MIT vote Berkeley Stanford Cornell Washington ONLINE POLLS

14. DOS ATTACKS

16. TEXT BASED CAPTCHA

17. CAPTCHA CAN BE BROKEN!!!! BUT…..

19. Animated CAPTCHA

21. Implicit CAPTCHA

23. rot CAPTCHA

24. Q & A Thanks CAPTCHA ANNOYANCE

25. Q & A Thanks

26. AUDIO CAPTCHA

27. CAPTCHA ANNOYANCE

29. DRAG AND DROP

31. DRAG AND DROP- Model

34. OCR

35. CAPTCHA SWEAT SHOPS SPAM COMPANIES HIRE HUMANS TO SOLVE CAPTCHAS ALL DAY LONG $2.50 PER HOUR FOR EACH HUMAN 720 CAPTCHAS PER HOUR PER HUMAN 1/3 CENT PER ACCOUNT LAUNDRY ATTACKS

36. CAPTCHA REDIRECTION

37. CAPTCHA REDIRECTION Type the word in the box if you want to see the next picture Free Nude Photos

40. DEMO

41. FEEDBACK

43. REFERENCES [1]. en.wikipedia.org [2]. “Protecting Websites with Reading Based CAPTCHAs” by Henry S. Baird and Mark Luk, California [3]. “Telling Humans And Computers Apart Automatically OR How Lazy Cryptographers Do AI” by Luis von Ahn, Manuel Blum, and JohnLangford. [4]. “Visual Reverse Turing Tests: A False Sense of Security” by Miroslav Ponec in 7th Annual IEEE Information Assurance Workshop, New York, 2006 5]. “Using Machine Learning to Break Visual Human Interaction Proofs” by Kumar Chellapilla and Patrice Y. Simard. [6]. “Recognizing Objects in Adversarial Clutter: Breaking a Visual CAPTCHA” by Jitendra Malik And Greg Mori [7]. “Enhanced CAPTCHAs: Using Animation to Tell Humans and Computers Apart” by Elias Athanasopoulos and Spiros Antonatos.

44. CONTACT arpanvdesai at hotmail dot com IMAGE FILE Questions ?