Cryptology ePrint Archive: Report 2021/1311

Power analysis attack on Kyber

Alexandre Karlov and Natacha Linard de Guertechin

Abstract: This paper describes a practical side-channel power analysis on CRYSTALS-Kyber key-encapsulation mechanism. In particular, we analyse the polynomial multiplication in the decapsulation phase to recover the secret key in a semi-static setting. The power analysis attack was performed against the KYBER512 implementation from pqm4 running on STM32F3 M4-cortex CPU.

Category / Keywords: implementation / Kyber, lattice-based cryptography, side-channel attacks, correlation power analysis

Date: received 28 Sep 2021

Contact author: alexandre karlov at cysec com

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Version: 20210928:184550 (All versions of this report)

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