[PiN-diskusjon] Nature: Unique in the Crowd: The privacy bounds of human mobility
Petter Reinholdtsen
pere at hungry.com
Tir 4. Jun 2013 09:35:39 CEST
<URL: http://www.nature.com/srep/2013/130325/srep01376/full/srep01376.html >
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.
Det er visst enklere å spore enkeltindivider med mobilbruksdata enn
jeg trodde.
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Vennlig hilsen
Petter Reinholdtsen
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