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Paper: Leakage Detection with the x2-Test

Authors:
Amir Moradi , Horst Görtz Institute for IT Security, Ruhr-Universität Bochum
Bastian Richter , Horst Görtz Institute for IT Security, Ruhr-Universität Bochum
Tobias Schneider , ICTEAM/ELEN/Crypto Group, Université catholique de Louvain
François-Xavier Standaert , ICTEAM/ELEN/Crypto Group, Université catholique de Louvain
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DOI: 10.13154/tches.v2018.i1.209-237
URL: https://tches.iacr.org/index.php/TCHES/article/view/838
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Abstract: We 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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BibTeX
@article{tches-2018-28971,
  title={Leakage Detection with the x2-Test},
  journal={Transactions on Cryptographic Hardware and Embedded Systems},
  publisher={Ruhr-Universität Bochum},
  volume={2018, Issue 1},
  pages={209-237},
  url={https://tches.iacr.org/index.php/TCHES/article/view/838},
  doi={10.13154/tches.v2018.i1.209-237},
  author={Amir Moradi and Bastian Richter and Tobias Schneider and François-Xavier Standaert},
  year=2018
}