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On correlation between the order of S-boxes and the strength of DES

Part of the Lecture Notes in Computer Science book series (LNCS,volume 950)

Abstract

This paper introduces a practical algorithm for deriving the best differential characteristic and the best linear expression of DES. Its principle is based on a duality between differential cryptanalysis and linear cryptanalysis, and applicable to various block ciphers. Then using this program, we observe how the order of S-boxes affects the strength of DES. We show that the order of the S-boxes is well-arranged against differential cryptanalysis, though it is not the best choice. On the other hand, our experimental results indicate that it is a very weak choice in regard to linear cryptanalysis. In other words, DES can be strengthened by just rearranging the order of the S-boxes.

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© 1995 Springer-Verlag Berlin Heidelberg

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Matsui, M. (1995). On correlation between the order of S-boxes and the strength of DES. In: De Santis, A. (eds) Advances in Cryptology — EUROCRYPT'94. EUROCRYPT 1994. Lecture Notes in Computer Science, vol 950. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0053451

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  • DOI: https://doi.org/10.1007/BFb0053451

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-60176-0

  • Online ISBN: 978-3-540-44717-7

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