Blind Side Channel on the Elephant LFSR

Awaleh Houssein Meraneh; Christophe Clavier; Hélène Le Bouder; Julien Maillard; Julien Maillard; Gaël Thomas

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Paper

Blind Side Channel on the Elephant LFSR

Topics: Applied Cryptography

In Proceedings of the 19th International Conference on Security and Cryptography SECRYPT - Volume 1, 25-34, 2022 , Lisbon, Portugal

Authors: Awaleh Houssein Meraneh ¹ ; Christophe Clavier ² ; Hélène Le Bouder ¹ ; Julien Maillard ^{3

;

2} and Gaël Thomas ⁴

Affiliations: ¹ IMT-Atlantique, OCIF, IRISA, Rennes, France ; ² Université de Limoges, XLIM-CNRS, Limoges, France ; ³ Université de Grenoble Alpes, CEA, LETI MINATEC Campus, F-38054 Grenoble, France ; ⁴ DGA Maîtrise de l’Information, Bruz, France

Keyword(s): Blind Side Channel Analysis, Hamming Weight, Elephant, LFSR, NIST.

Abstract: Elephant is a finalist to the NIST lightweight cryptography competition. In this paper, the first theoretical blind side channel attack against the authenticated encryption algorithm Elephant is presented. More precisely, we are targetting the LFSR-based counter used internally. LFSRs are classic functions used in symmetric cryptography. In the case of Elephant, retrieving the initial state of the LFSR is equivalent to retrieving the encryption key. The paper ends by the study of different ways to tweak the design of Elephant to mitigate our attack.

CC BY-NC-ND 4.0

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Paper citation in several formats:

Houssein Meraneh, A. ; Clavier, C. ; Le Bouder, H. ; Maillard, J. and Thomas, G. (2022). Blind Side Channel on the Elephant LFSR. In Proceedings of the 19th International Conference on Security and Cryptography - SECRYPT; ISBN 978-989-758-590-6; ISSN 2184-7711, SciTePress, pages 25-34. DOI: 10.5220/0011135300003283

@conference{secrypt22,
author={Awaleh {Houssein Meraneh} and Christophe Clavier and Hélène {Le Bouder} and Julien Maillard and Gaël Thomas},
title={Blind Side Channel on the Elephant LFSR},
booktitle={Proceedings of the 19th International Conference on Security and Cryptography - SECRYPT},
year={2022},
pages={25-34},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0011135300003283},
isbn={978-989-758-590-6},
issn={2184-7711},
}

TY - CONF

JO - Proceedings of the 19th International Conference on Security and Cryptography - SECRYPT
TI - Blind Side Channel on the Elephant LFSR
SN - 978-989-758-590-6
IS - 2184-7711
AU - Houssein Meraneh, A.
AU - Clavier, C.
AU - Le Bouder, H.
AU - Maillard, J.
AU - Thomas, G.
PY - 2022
SP - 25
EP - 34
DO - 10.5220/0011135300003283
PB - SciTePress