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Communication Dans Un Congrès Année : 2023

Blind Side Channel On The Elephant LFSR

Résumé

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.
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Dates et versions

hal-03672917 , version 1 (19-05-2022)

Licence

CC0 - Transfert dans le Domaine Public

Identifiants

  • HAL Id : hal-03672917 , version 1

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Awaleh Houssein Meraneh, Christophe Clavier, Hélène Le Bouder, Julien Maillard, Gaël Thomas. Blind Side Channel On The Elephant LFSR. SECRYPT 2022, 2022, Lisbonne, Portugal. ⟨hal-03672917⟩
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