Welcome to the resource topic for 2023/1587
Title:
A Single-Trace Message Recovery Attack on a Masked and Shuffled Implementation of CRYSTALS-Kyber
Authors: Sönke Jendral, Kalle Ngo, Ruize Wang, Elena Dubrova
Abstract:Last year CRYSTALS-Kyber was chosen by NIST as a new, post-quantum secure key encapsulation mechanism to be standardized. This makes it important to assess the resistance of CRYSTALS-Kyber implementations to physical attacks. Pure side-channel attacks on post-quantum cryptographic algorithms have already been well-explored. In this paper, we present an attack on a masked and shuffled software implementation of CRYSTALS-Kyber that combines fault injection with side-channel analysis. First, a voltage fault injection is performed to bypass the shuffling. We found settings that consistently glitch the desired instructions without crashing the device. After the successful fault injection, a deep learning-assisted profiled power analysis based on the Hamming weight leakage model is used to recover the message (shared key). We propose a partial key enumeration method that allows us to significantly increase the success rate of message recovery (from 0.122 without enumeration to 0.887 with 32 enumerated bits).
ePrint: https://eprint.iacr.org/2023/1587
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