On the Structure of Randomly PermutedConcatenated
نویسنده
چکیده
Our purpose here is to show how it is possible to recover the structure of a randomly permuted concatenated code, and how to use this information for decoding. This result prohibits the use of rst order concatenated codes in public-key cryp-tosystems based on error-correcting codes. R esum e Nous montrons ici comment il est possible de reconstituer la structure d'un code concat en e permut e al eatoirement et comment utiliser cette information pour le d e-codage. Ce r esultat met en cause l'utilisation des code concat en es du premier or-dre dans les syst emes de chiirement a cl e publique bas es sur les codes correcteurs d'erreurs.
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