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Title:
Single-trace side-channel attacks on MAYO exploiting leaky modular multiplication
Authors: Sönke Jendral, Elena Dubrova
Abstract:In response to the quantum threat, new post-quantum cryptographic algorithms will soon be deployed to replace existing public-key schemes. MAYO is a quantum-resistant digital signature scheme whose small keys and signatures make it suitable for widespread adoption, including on embedded platforms with limited security resources. This paper demonstrates two single-trace side-channel attacks on a MAYO implementation in ARM Cortex-M4 that recover a secret key with probabilities of 99.9% and 91.6%, respectively. Both attacks use deep learning-assisted power analysis exploiting information leakage during modular multiplication to reveal a vector in the oil space. This vector is then extended to a full secret key using algebraic techniques.
ePrint: https://eprint.iacr.org/2024/1850
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