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Paper 2021/1181

Rosita++: Automatic Higher-Order Leakage Elimination from Cryptographic Code

Madura A. Shelton, Łukasz Chmielewski, Niels Samwel, Markus Wagner, Lejla Batina, and Yuval Yarom

Abstract

Side-channel attacks are a major threat to the security of cryptographic implementations, particularly for small devices that are under the physical control of the adversary. While several strategies for protecting against side-channel attacks exist, these often fail in practice due to unintended interactions between values deep within the CPU. To detect and protect from side-channel attacks, several automated tools have recently been proposed; one of their common limitations is that they only support first-order leakage. In this work, we present , the first automated tool for detecting and eliminating higher-order leakage from cryptographic implementations. Rosita++ proposes statistical and software-based tools to allow high-performance higher-order leakage detection. It then uses the code rewrite engine of Rosita (Shelton et al. NDSS 2021) to eliminate detected leakage. For the sake of practicality we evaluate Rosita++ against second and third order leakage, but our framework is not restricted to only these orders. We evaluate Rosita++ against second-order leakage with three-share implementations of two ciphers, PRESENT and Xoodoo, and with the second-order Boolean-to-arithmetic masking, a core building block of masked implementations of many cryptographic primitives, including SHA-2, ChaCha and Blake. We show effective second-order leakage elimination at a performance cost of 36% for Xoodoo, 189% for PRESENT, and 29% for the Boolean-to-arithmetic masking. For third-order analysis, we evaluate Rosita++ against the third-order leakage using a four-share synthetic example that corresponds to typical four-share processing. Rosita++ correctly identified this leakage and applied code fixes.

Metadata
Available format(s)
PDF
Category
Applications
Publication info
Published elsewhere. 2021 ACM SIGSAC Conference on Computer and Communications Security (CCS 2021)
DOI
10.1145/3460120.3485380
Keywords
Power analysis leakagemultivariate leakageautomatic countermeasures
Contact author(s)
madura shelton @ adelaide edu au
lukaszc @ cs ru nl
nsamwel @ cs ru nl
markus wagner @ adelaide edu au
lejla @ cs ru nl
yval @ cs adelaide edu au
History
2021-09-14: received
Short URL
https://ia.cr/2021/1181
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2021/1181,
      author = {Madura A.  Shelton and Łukasz Chmielewski and Niels Samwel and Markus Wagner and Lejla Batina and Yuval Yarom},
      title = {Rosita++: Automatic Higher-Order Leakage Elimination from Cryptographic Code},
      howpublished = {Cryptology ePrint Archive, Paper 2021/1181},
      year = {2021},
      doi = {10.1145/3460120.3485380},
      note = {\url{https://eprint.iacr.org/2021/1181}},
      url = {https://eprint.iacr.org/2021/1181}
}
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