Leakage Detection with the x2-Test
Keywords:t-test, SCA evaluation, SCA distinguisher, statistical moments
AbstractWe describe how Pearson’s χ2-test can be used as a natural complement to Welch’s t-test for black box leakage detection. In particular, we show that by using these two tests in combination, we can mitigate some of the limitations due to the moment-based nature of existing detection techniques based on Welch’s t-test (e.g., for the evaluation of higher-order masked implementations with insufficient noise). We also show that Pearson’s χ2-test is naturally suited to analyze threshold implementations with information lying in multiple statistical moments, and can be easily extended to a distinguisher for key recovery attacks. As a result, we believe the proposed test and methodology are interesting complementary ingredients of the side-channel evaluation toolbox, for black box leakage detection and non-profiled attacks, and as a preliminary before more demanding advanced analyses.
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Copyright (c) 2018 Amir Moradi, Bastian Richter, Tobias Schneider, François-Xavier Standaert
This work is licensed under a Creative Commons Attribution 4.0 International License.