[Resource Topic] 2018/1195: M&M: Masks and Macs against Physical Attacks

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M&M: Masks and Macs against Physical Attacks

Authors: Lauren De Meyer, Victor Arribas, Svetla Nikova, Ventzislav Nikov, Vincent Rijmen


Cryptographic implementations on embedded systems need to be protected against physical attacks. Today, this means that apart from incorporating countermeasures against side-channel analysis, implementations must also withstand fault attacks and combined attacks. Recent proposals in this area have shown that there is a big tradeoff between the implementation cost and the strength of the adversary model. In this work, we introduce a new combined countermeasure M&M that combines Masking with information-theoretic MAC tags and infective computation. It works in a stronger adversary model than the existing scheme ParTI, yet is a lot less costly to implement than the provably secure MPC-based scheme CAPA. We demonstrate M&M with a SCA- and DFA-secure implementation of the AES block cipher. We evaluate the side-channel leakage of the second-order secure design with a non-specific t-test and use simulation to validate the fault resistance.

ePrint: https://eprint.iacr.org/2018/1195

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