2 research outputs found
On Conditional Correlations
The Pearson correlation, correlation ratio, and maximal correlation have been
well-studied in the literature. In this paper, we study the conditional
versions of these quantities. We extend the most important properties of the
unconditional versions to the conditional versions, and also derive some new
properties. Based on the conditional maximal correlation, we define an
information-correlation function of two arbitrary random variables, and use it
to derive an impossibility result for the problem of the non-interactive
simulation of random variables.Comment: 20 pages. The application of our results on conditional correlations
to the non-interactive simulation problem was adde
Data Disclosure under Perfect Sample Privacy
Perfect data privacy seems to be in fundamental opposition to the economical
and scientific opportunities associated with extensive data exchange. Defying
this intuition, this paper develops a framework that allows the disclosure of
collective properties of datasets without compromising the privacy of
individual data samples. We present an algorithm to build an optimal disclosure
strategy/mapping, and discuss it fundamental limits on finite and
asymptotically large datasets. Furthermore, we present explicit expressions to
the asymptotic performance of this scheme in some scenarios, and study cases
where our approach attains maximal efficiency. We finally discuss suboptimal
schemes to provide sample privacy guarantees to large datasets with a reduced
computational cost.Comment: 34 pages, 6 Figures, 1 Tabl