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Design et Analyse de sécurité pour les constructions en cryptographie symétrique

Abstract : The work done during this Ph.D. lies at the crossroads of symmetric cryptography and constraints environments. The goal of such cryptography, called lightweight cryptography, is to propose and evaluate symmetric algorithms that can be implemented on very ressource limited devices. The contributions of this thesis are first on the security evaluations of feedback with carry shift registers (FCSR) to some new attacks and second on a unified vision of generalized Feistel networks (GFNs) that allows to better understand their cryptographic properties. These studies gave rise to two new lightweight algorithms: first GLUON a hash function based upon FCSRs and second the cipher LILLIPUT based on a family further extanding the notion of generalized Feistel network. Finally, a generic method for carrying out a differential fault attack on GFNs is outlined.
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Submitted on : Tuesday, August 18, 2015 - 2:48:06 PM
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Gaël Thomas. Design et Analyse de sécurité pour les constructions en cryptographie symétrique. Cryptographie et sécurité [cs.CR]. Université de Limoges, 2015. Français. ⟨NNT : 2015LIMO0042⟩. ⟨tel-01184927⟩

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