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  • This session has been presented May 24, 2024.

Description

  • Speaker

    Modou SARRY - IMT Atlantique

Les dispositifs interconnectés tels que les réseaux de capteurs, la santé, les systèmes de contrôle distribués, l’internet des objets et les systèmes cyber-physiques sont de plus en plus répandus. Cette transition vers de petits appareils engendre de nouvelles préoccupations en matière de sécurité et de vie privée, car de nombreux algorithmes cryptographiques classiques ne répondent pas toujours aux exigences spécifiques de ces dispositifs restreints. Face à ce besoin de nouvelles solutions, le NIST a lancé une compétition visant à solliciter, évaluer et normaliser les algorithmes cryptographiques légers adaptés à ces environnements contraints. Ma thèse se concentre sur la compréhension de l’impact des attaques physiques sur la sécurité des chiffrements intègres lègers, en particulier ceux proposés dans le cadre de la compétition du NIST. Nous proposons ainsi une attaque par observation à textes inconnus sur Elephant. Ces travaux aboutissent également au développement d’outils génériques pour la propagation de croyance, ou- vrant ainsi de nouvelles perspectives pour l’évaluation de la sécurité des systèmes cryp- tographiques. Parallèlement, nous explorons l’utilisation de la propagation de croyance pour effectuer des attaques par observation à textes inconnus sur Elephant et Sparkle. Ces recherches contribuent de manière significative à la compréhension et à l’amélioration de la sécurité des systèmes embarqués et des dispositifs interconnectés dans des domaines critiques.

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