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  • This session has been presented June 02, 2006.

Description

  • Speaker

    Anne Canteaut et Jean-Pierre Tillich - INRIA, projet CODES

Un certain nombre de cryptanalyses sur les algorithmes de chiffrement à flot peuvent s'exprimer comme des problèmes de correction d'erreurs et bénéficient par conséquent des progrès réalisés dans le domaine du décodage. Dans cet exposé, nous présenterons plusieurs attaques sur les systèmes par registre filtré qui reposent toutes sur l'existence de relations linéaires creuses entre les bits de la suite à filtrer. Nous montrerons comment ces relations peuvent être exploitées par les techniques de décodage itératif que nous analyserons en détail.

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