On 7/6/07, Paul Wouters <[EMAIL PROTECTED]> wrote:
A paper was presented at the Privacy Enhancing Technologies
conference in Ottawa a few weeks ago:
Louis, Lester and Pierre: Three Protocols for Location Privacy
Ge Zhong, Ian Goldberg, Urs Hengartner (University of Waterloo)
See: http://petworkshop.org/2007/papers/PET2007_preproc_Louis_Lester.pdf
Especially, an implementation of the Pierre protocol would be
interesting. In essence, using the protocol, two people can
reveal each others location but only when they are close to
each other. In other words, if you are not close to each other,
the other person does not obtain your location information.
Additionally, you can lie about your location if you just do not
want to be found right now, without revealing to the other person
that you are lying.
This would be a very cool IM plugin for Openmoko, and a good use
of the GPS in Openmoko without losing your privacy.
This does indeed look interesting. The issues I see are:
- All the protocols rely on communication between peers, which is
difficult in cell networks. Naturally this could be worked around by
introducing a third-party as a relay, though.
- Determining which friends are near you would require conducting the
protocol with every one of them on a regular basis. This would be
rather cumbersome for a large-scale system.
-Nick Johnson
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