The document discusses promoting location privacy by adding fake location data to users' real locations. It proposes adding 99 random fake locations to a user's true location, making aggregate location data less accurate. While some services want to share all user location data, this technique could help protect privacy by evading detection in aggregate location analyses while still allowing some location-based services.

1. promoting location privacy…

2. promoting location privacy… one lie at a time

3. daniele quercia

5. meets

6. mobile phone location data

8. recommend social events…

9. … upon aggregate location data

11. upon aggregate location data…

13. upon aggregate location data…

14. upon aggregate location data…

15. upon aggregate location data…

16. #fail $

17. aggregate data:= data mashup

18. !!! Public vs. Publicized

19. Aggregate Data: A tale of disrupted social expectations

20. share it all [by Facebook CEO]

21. share it all [by Facebook CEO] share nothing [by Wisdom of the Granmother’s Foundation]

22. share it all [by Facebook CEO] share nothing [by Wisdom of the Granmother’s Foundation] share fake data [by Us]

23. share fake data [by Us]

24. Idea:

25. true location + + “99” fake locations

26. true location + + “99” fake locations true location + + “99” fake locations true location + + “99” fake locations

27. #phones?

28. (random) fake locations

29. Tube passengers in London & car drivers in Zurich: accurately estimate #people

30. Tube passengers in London & car drivers in Zurich: accurately estimate #people (18% error with 99% fake locations)

31. (random) fake locations

32. (random) fake locations Evade paying taxes? Don’t answer! Flip a coin instead

33. Yes! [truth]

34. true location + + “99” fake locations true location + + “99” fake locations true location + + “99” fake locations

35. promoting location privacy… one lie at a time

36. Future

37. Future 1|social norms

38. Future 2|reintroducing forgetting