Chaire Cyber CNI

Chaire Cyber CNI – Cybersecurity for Critical Networked Infrastructures

“Blind Side Channel on the Elephant LFSR”

Notre doctorant Awaleh Meraneh (IMT Atlantique, Sujet P1: AI-suppported Side-channel based Anomaly Detection) participera au 19e « International Conference on Security and Cryptography » (SECRYPT 2022) qui se tiendra du 11 au 13 juillet 2022 à Lisbonne (Portugal). Vous trouverez plus d’informations sur la conférence ici : https://secrypt.scitevents.org/

Cet événement a pour but de solliciter des soumissions de la part du monde universitaire, de l’industrie et du gouvernement présentant des recherches novatrices sur tous les aspects théoriques et pratiques de la protection des données, de la confidentialité, de la sécurité et de la cryptographie.

C’est dans ce cadre qu’Awaleh présentera sa communication :

  • Full paper Awaleh Houssein Meraneh, Christophe Clavier, Hélène Le Bouder, Julien Maillard & Gaëlle Thomas, “Blind Side Channel On The Elephant LFSR

Voici l’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.

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