Hints from Hertz: Dynamic Frequency Scaling Side-Channel Analysis of Number Theoretic Transform in Lattice-Based KEMs

ePrint Report: Hints from Hertz: Dynamic Frequency Scaling Side-Channel Analysis of Number Theoretic Transform in Lattice-Based KEMs

Tianrun Yu, Chi Cheng, Zilong Yang, Yingchen Wang, Yanbin Pan, Jian Weng

Number Theoretic Transform (NTT) has been widely used in accelerating computations in lattice-based cryptography. However, attackers can potentially launch power analysis targeting NTT because it is usually the most time-consuming part of the implementation. This extended time frame provides a natural window of opportunity for attackers. In this paper, we investigate …

analysis attackers channel cryptography dynamic eprint report hertz ntt pan report scaling side-channel transform wang