1 / 19

Location Obscuring

Location Obscuring. draft- thomson -geopriv-location-obscuring GEOPRIV, IETF-79 Martin Thomson. Goals. Pick an obscuring distance . Take a series of known locations , which might have greater accuracy than the recipient is permitted to receive.

nitara
Download Presentation

Location Obscuring

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Location Obscuring draft-thomson-geopriv-location-obscuring GEOPRIV, IETF-79 Martin Thomson

  2. Goals • Pick an obscuring distance. • Take a series of known locations, which might have greater accuracy than the recipient is permitted to receive. • The obscuring process produces a series of reported locations.

  3. Static Case

  4. Constant Updates

  5. When to Update

  6. When to Update: Whoops

  7. Hidden Trigger

  8. Varying Hidden Trigger

  9. Problem

  10. Very Small Uncertainty

  11. Recast Problem

  12. Continuous Random Field

  13. Interpolation A B C D

  14. But the Earth isn’t flat

  15. Skewed Interpolation grid / cos(latitude) A B C D grid / cos(latitude)

  16. Uniform Distributed Interpolation P(r) t=0.5 r = a(1-t) + bt t=0.3 t=0.2 t=0.1 Goal: Uniform distribution of offset a b

  17. Interpolation

  18. Demonstration… http://held-location.sourceforge.net/js_geoshape/maptest.html

  19. Alternative

More Related