On Sun, Jun 02, 2013 at 10:16:20PM -0400, Nathan of Guardian wrote:
> In summary, if the focused threat you need to address is location
> tracking by carriers/operators, and you live in an area with a decent
> saturation of "open" wifi hotspots, I feel there is something you can do
> about it. Now your adversaries have to work a bit harder (tracking IPs
> to hotspots, physical surveillance, etc) to build a geo map of your
> comings and goings.
In re this topic, please see this paper:
Unique in the Crowd: The privacy bounds of human mobility
http://www.nature.com/srep/2013/130325/srep01376/full/srep01376.html
Abstract:
We study fifteen months of human mobility data for one and a half
million individuals and find that human mobility traces are highly
unique. In fact, in a dataset where the location of an individual
is specified hourly, and with a spatial resolution equal to that
given by the carrier's antennas, four spatio-temporal points are
enough to uniquely identify 95% of the individuals. We coarsen
the data spatially and temporally to find a formula for the
uniqueness of human mobility traces given their resolution and
the available outside information. This formula shows that the
uniqueness of mobility traces decays approximately as the 1/10
power of their resolution. Hence, even coarse datasets provide
little anonymity. These findings represent fundamental constraints
to an individual's privacy and have important implications for
the design of frameworks and institutions dedicated to protect
the privacy of individuals.
And remember Schneier's maxim: attacks always get better. So the work
which these researchers have done (and it appears to me to be fine work)
will be extended, refined, improved.
---rsk
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