International Association
for Cryptologic Research

Kyber a.k.a ML-KEM has been stardardized by NIST under FIPS-203 and will definetely in the coming years be implemented in several commercial products. However the resilience of implementations against side channel attacks is still an open and practical concern. One of the drawbacks of the ongoing side channel analysis research related to PQC schemes is the availability of open source datasets. Luckily some opensource datasets start popping up. For instance the one recently published by Rezaeezade et al. in [2]. This dataset captures power consumption during a pair- pointwise multiplication occuring in the course of ML-KEM decapsulation process and involving the decapsulation (sub)key and ciphertexts. In this paper we present a template side channel attack targetting that operation, which yields a complete recovery of the decapsulation secret (sub)key.