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Authors: Michael Tunstall 1 ; Louiza Papachristodoulou 2 and Kostas Papagiannopoulos 3

Affiliations: 1 Rambus, 4453 North First Street, Suite 100, San Jose, California, U.S.A. ; 2 Fontys University of Applied Sciences, Rachelsmolen 1, Eindhoven, The Netherlands ; 3 University of Amsterdam, SNE-CCI, Science Park 904, Amsterdam, The Netherlands

Keyword(s): Exponent Splitting, Side-channel Attacks, Countermeasures.

Abstract: A typical countermeasure against side-channel attacks consists of masking intermediate values with a random number. In symmetric cryptographic algorithms, Boolean shares of the secret are typically used, whereas in asymmetric algorithms the secret exponent is typically masked using algebraic properties. This paper presents a new exponent splitting technique with minimal impact on performance based on Boolean shares, typically requiring only an extra register and a few register copies per bit. We perform a security evaluation of our algorithms using a mutual information framework and provide proofs that they are secure against first-order side-channel attacks. The side-channel resistance of the proposed algorithms are also practically verified with test vector leakage assessment performed on Xilinx’s Zynq zc702 evaluation board.

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Paper citation in several formats:
Tunstall, M.; Papachristodoulou, L. and Papagiannopoulos, K. (2021). Boolean Exponent Splitting. In Proceedings of the 18th International Conference on Security and Cryptography - SECRYPT; ISBN 978-989-758-524-1; ISSN 2184-7711, SciTePress, pages 321-332. DOI: 10.5220/0010570903210332

@conference{secrypt21,
author={Michael Tunstall. and Louiza Papachristodoulou. and Kostas Papagiannopoulos.},
title={Boolean Exponent Splitting},
booktitle={Proceedings of the 18th International Conference on Security and Cryptography - SECRYPT},
year={2021},
pages={321-332},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0010570903210332},
isbn={978-989-758-524-1},
issn={2184-7711},
}

TY - CONF

JO - Proceedings of the 18th International Conference on Security and Cryptography - SECRYPT
TI - Boolean Exponent Splitting
SN - 978-989-758-524-1
IS - 2184-7711
AU - Tunstall, M.
AU - Papachristodoulou, L.
AU - Papagiannopoulos, K.
PY - 2021
SP - 321
EP - 332
DO - 10.5220/0010570903210332
PB - SciTePress