crowdshare, secure resource sharing in mobile crowds

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  • 1. CrowdShareSecure Resource Sharing in Mobile Crowds Stanislaus Stelle CASED / TU Darmstadt 8th of March 2013 on Moosecon Joined work withAlexandra Dmitrienko | Ahmad-Reza Sadeghi | Elena Reshetova | Thomas Schneider | N. Asokan 1
  • 2. Motivation 2
  • 3. Motivation Resource Sharing 3
  • 4. Motivation Resource Sharing Collaborative work 4
  • 5. Motivation Resource Sharing Collaborative work Social Networks 5
  • 6. Motivation Resource Sharing Collaborative work Social Networks Mobile 6
  • 7. Depends on Carrier 7
  • 8. 4.6 billions without Internet 8
  • 9. 4.6 billions without Internet Focus on Internet Availability 9
  • 10. What can wedo about it 10
  • 11. Existing Technology: Tethering Participant Participant Access Point 11
  • 12. Existing Technology: Tethering Range Participant Participant Access Point 12
  • 13. Existing Technology: Tethering Range Password Distribution Password Participant Participant Access Point Password 13
  • 14. Solution: Multihop Resource Sharing 14
  • 15. How shouldthis work? 15
  • 16. Mesh Network Routing: BATMAN 16
  • 17. What aboutsecurity? 17
  • 18. Link Security
  • 19. Link Security Access Control
  • 20. AnonymityLink Security Access Control 20
  • 21. Liability AnonymityLink Security Access Control 21
  • 22. Implementation for AndroidLink Security SSL/VPNAnonymity Registration with Certs.Liability Signed Resource RequestsAccess Control FoF Service
  • 23. And whataboutliability? 23
  • 24. Liability InternetWantstotether HasInternetConnection 24
  • 25. Liability 25
  • 26. Liability 26
  • 27. Liability 27
  • 28. Bound to phone number Liability Destination IP, Protocol, Port, Timestamp 28
  • 29. Liability 29
  • 30. Liability 30
  • 31. Liability 31
  • 32. Liability 32
  • 33. Liability 33
  • 34. Liability 34
  • 35. And whataboutaccesscontrol? 35
  • 36. Friend of Friend Service Simple alternative Fancy alternative 36
  • 37. Simple alternative register 37
  • 38. Simple alternative sync 38
  • 39. Simple alternative Transmit Whitelists 39
  • 40. Fancy alternative 40
  • 41. Challenges WiFi and 3G at the same time WiFi in Ad-Hoc mode Dynamic Access Control
  • 42. WiFi and 3G at the same time

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