A Side-Channel Attack on a Bitsliced Higher-Order Masked CRYSTALS-Kyber Implementation

ePrint Report: A Side-Channel Attack on a Bitsliced Higher-Order Masked CRYSTALS-Kyber Implementation

Ruize Wang, Martin Brisfors, Elena Dubrova

In response to side-channel attacks on masked implementations of post-quantum cryptographic algorithms, a new bitsliced higher-order masked implementation of CRYSTALS-Kyber has been presented at CHES'2022. The bitsliced implementations are typically more difficult to break by side-channel analysis because they execute a single instruction across multiple bits in parallel. However, in this paper, we reveal new vulnerabilities in the masked Boolean to arithmetic …

algorithms attack attacks channel ches crystals-kyber eprint report higher implementation order post-quantum quantum report response side-channel side-channel attack side-channel attacks