International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: Consolidating Security Notions in Hardware Masking

Lauren De Meyer , KU Leuven, imec - COSIC, Leuven, Belgium
Begül Bilgin , KU Leuven, imec - COSIC, Leuven, Belgium; Rambus, Cryptography Research, Rotterdam
Oscar Reparaz , KU Leuven, imec - COSIC, Leuven, Belgium; Square Inc., San Francisco
DOI: 10.13154/tches.v2019.i3.119-147
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Presentation: Slides
Abstract: In this paper, we revisit the security conditions of masked hardware implementations. We describe a new, succinct, information-theoretic condition called d-glitch immunity which is both necessary and sufficient for security in the presence of glitches. We show that this single condition includes, but is not limited to, previous security notions such as those used in higher-order threshold implementations and in abstractions using ideal gates. As opposed to these previously known necessary conditions, our new condition is also sufficient. On the other hand, it excludes avoidable notions such as uniformity. We also treat the notion of (strong) noninterference from an information-theoretic point-of-view in order to unify the different security concepts and pave the way to the verification of composability in the presence of glitches. We conclude the paper by demonstrating how the condition can be used as an efficient and highly generic flaw detection mechanism for a variety of functions and schemes based on different operations.
Video from TCHES 2019
  title={Consolidating Security Notions in Hardware Masking},
  journal={IACR Transactions on Cryptographic Hardware and Embedded Systems},
  publisher={Ruhr-Universität Bochum},
  volume={2019, Issue 3},
  author={Lauren De Meyer and Begül Bilgin and Oscar Reparaz},