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the most powerful, its performance is greatly improved compared to the classical
histogram estimator that has been used in the literature as a reference.
6Conluon
In this paper, we review some of the most statistically powerful nonparametric
estimators of mutual information in the context of side-channel analysis. The
distinction between parametric and nonparametric methods is important and
should be clearly made when comparing side-channel distinguishers eciency.
Depending on the supposed knowledge of the adversary, one of these two classes
of attacks needs to be considered. We also note that, in terms of performance,
nonparametric estimation in MIA is not as bad as previously thought. The KDE
and BSE estimators perform quite well for an acceptable computational overhead
in the case of BSE. Even if the study is done on CMOS devices, we can expect
a similar improvement of performance on different types of logic when using
ecient nonparametric methods.
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