Provable Security against Impossible Differential Cryptanalysis Application to CS-Cipher

نویسندگان

  • Thomas Roche
  • Roland Gillard
  • Jean-Louis Roch
چکیده

In this document we present a new way to bound the probability of occurrence of an n-round differential in the context of differential cryptanalysis. Hence this new model allows us to claim proof of resistance against impossible differential cryptanalysis, as defined by Biham and al. in 1999. This work will be described through the example of CS-Cipher, to which, assuming some non-trivial hypothesis, provable security against impossible differential cryptanalysis is obtained.

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تاریخ انتشار 2008