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On the Complexity of Matsui’s Attack

  • Pascal Junod
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2259)

Abstract

Linear cryptanalysis remains the most powerful attack against DES at this time. Given 243 known plaintext-ciphertext pairs, Matsui expected a complexity of less than 243 DES evaluations in 85 % of the cases for recovering the key. In this paper, we present a theoretical and experimental complexity analysis of this attack, which has been simulated 21 times using the idle time of several computers. The experimental results suggest a complexity upper-bounded by 241 DES evaluations in 85 % of the case, while more than the half of the experiments needed less than 239 DES evaluations. In addition, we give a detailed theoretical analysis of the attack complexity.

Keywords

linear cryptanalysis DES 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Pascal Junod
    • 1
  1. 1.Security and Cryptography LaboratorySwiss Federal Institute of TechnologyLausanneSwitzerland

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