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Sybil Attacks Against Mobile Users

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"Sybil Attacks Against Mobile Users: Friends and Foes to the Rescue". Presentation at INFOCOM 2010 of this paper
http://eprints.ucl.ac.uk/18812/1/18812.pdf

Published in: Technology
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Sybil Attacks Against Mobile Users

  1. 1. _ _
  2. 2. I did my PhD @
  3. 3. U niversity C ollege L ondon
  4. 4. <PhD>
  5. 5. Ratings on ...
  6. 6. Ratings on phones
  7. 7. Why ratings on mobiles?
  8. 8. Situation : People exchange digital content
  9. 9. People
  10. 13. The problem is ...
  11. 14. drowning user (content overload) help! who will come to the rescue?
  12. 15. Proposal: Accept content only from reputable people
  13. 16. Use Store
  14. 17. Use Store MobiRate [Ubicomp08]
  15. 18. Use Store LDTP [ICDM07] MobiRate [Ubicomp08]
  16. 19. MobID
  17. 20. Collaborative applications: track trustworthiness of IDs
  18. 21. one misbehaves & creates bogus identities (goes untraceable)
  19. 22. Traditional Solutions
  20. 23. pki
  21. 24. p2p socnet fast mixing & no churn
  22. 25. 1. u’ve got friends: honest & key-enabled! 2. u don’t move randomly 3. homophily: P(honest  honest)=HIGH assumptions
  23. 26. “ A meets B” @A: 1. B &co. into its network 2. rank B 3. accept/reject B
  24. 31. device keeps 2 nets & reasons on them
  25. 33. 1. B &co. into networks 2. 2 ranks for B 3. accept/reject B 4. update networks` “ A meets B”
  26. 34. GoodRank BadRank B C D E F G L M N O P
  27. 35. GoodRank BadRank B C D E F G L M N O P
  28. 36. Does it work?
  29. 42. issue 1: social exclusion
  30. 43. MobID + FriendSensing
  31. 44. FriendSensing ((.))
  32. 46. Keep Bluetooth on (record who is around)
  33. 47. Upload records
  34. 48. People you may know
  35. 49. People You May Know Forrest Gump Bambie Barack Obama Add to Friends Add to Friends Add to Friends
  36. 50. MobID + FriendSensing
  37. 51. If you are looking for Kinky boots issue 2
  38. 52. whether you are …
  39. 53. a woman…
  40. 54. or a man a woman…
  41. 55. Thorny problem:
  42. 56. … or a woman… How to keep it secret

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