Reference : Defeating State-of-the-Art White-Box Countermeasures with Advanced Gray-Box Attacks
Scientific journals : Article
Engineering, computing & technology : Computer science
Security, Reliability and Trust
Defeating State-of-the-Art White-Box Countermeasures with Advanced Gray-Box Attacks
Goubin, Louis mailto [Université Paris-Saclay, UVSQ, CNRS > Laboratoire de Mathématiques de Versailles]
Rivain, Matthieu mailto [CryptoExperts]
Wang, Junwei mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > > ; CryptoExperts > > > ; Université Paris 8]
IACR Transactions on Cryptographic Hardware and Embedded Systems
[en] white-box cryptography ; linear masking ; non-linear masking ; shuffling ; data-dependency
[en] The goal of white-box cryptography is to protect secret keys embedded in a cryptographic software deployed in an untrusted environment. In this article, we revisit state-of-the-art countermeasures employed in white-box cryptography, and we discuss possible ways to combine them. Then we analyze the different gray-box attack paths and study their performances in terms of required traces and computation time. Afterward, we propose a new paradigm for the gray-box attack against white-box cryptography, which exploits the data-dependency of the target implementation. We demonstrate that our approach provides substantial complexity improvements over the existing attacks. Finally, we showcase this new technique by breaking the three winning AES-128 white-box implementations from WhibOx 2019 white-box cryptography competition.
French FUI AAP25

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