Presented by:
Josep Domingo-Ferrer
Jordi Soria-Comas
Date:
Thursday 8th December 2016 - 10:15 to 11:00
Venue:
INI Seminar Room 1
Abstract:
Differential privacy is well-known because of the strong privacy guarantees
it offers: the results of a data analysis must be indistinguishable
between data sets that differ in one record. However, the use of differential
privacy may limit the accuracy of the results significantly. Essentially, we
are limited to data analyses with small global sensitivity (although some
workarounds have been proposed that improve the accuracy of the results
when the local sensitivity is small). We introduce individual differential
privacy (iDP), a relaxation of differential privacy that: (i) preserves the
strong privacy guarantees that differential privacy gives to individuals,
and (ii) improves the accuracy of the results significantly. The improvement
in the accuracy comes from the fact that the trusted party does a
more precise assessment of the risk associated to a given data analysis.
This is possible because we allow the trusted party to take advantage of
all the available information, namely the actual data set.
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