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Be my guess: Guessing entropy vs. success rate for evaluating side-channel attacks of secure chips

Julien Béguinot 1, 2, 3 Wei Cheng 2, 1, 3 Sylvain Guilley 2, 4, 3, 5 Olivier Rioul 2, 1, 3 
1 COMNUM - Communications Numériques
LTCI - Laboratoire Traitement et Communication de l'Information
4 SSH - Secure and Safe Hardware
LTCI - Laboratoire Traitement et Communication de l'Information
Abstract : In a theoretical context of side-channel attacks, optimal bounds between success rate and guessing entropy are derived with a simple majorization (Schur-concavity) argument. They are further theoretically refined for different versions of the classical Hamming weight leakage model, in particular assuming apriori equiprobable secret keys and additive white Gaussian measurement noise. Closed-form expressions and numerical computation are given. A study of the impact of the choice of the substitution box with respect to side-channel resistance reveals that its nonlinearity tends to homogenize the expressivity of success rate and guessing entropy. The intriguing approximate relation GE = 1/SR is observed in the case of 8-bit bytes and low noise.
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https://hal.telecom-paris.fr/hal-03718723
Contributor : Olivier Rioul Connect in order to contact the contributor
Submitted on : Friday, August 12, 2022 - 1:00:12 PM
Last modification on : Thursday, August 18, 2022 - 11:47:26 AM
Long-term archiving on: : Sunday, November 13, 2022 - 6:32:34 PM

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  • HAL Id : hal-03718723, version 1

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Julien Béguinot, Wei Cheng, Sylvain Guilley, Olivier Rioul. Be my guess: Guessing entropy vs. success rate for evaluating side-channel attacks of secure chips. 25th Euromicro Conference on Digital System Design (DSD 2022), Aug 2022, Maspalomas, Gran Canaria, Spain. ⟨hal-03718723⟩

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