Linear Cryptanalysis Method for DES Cipher

  • Mitsuru Matsui
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 765)

Abstract

We introduce a new method for cryptanalysis of DES cipher, which is essentially a known-plaintext attack. As a result, it is possible to break 8-round DES cipher with 221 known-plaintexts and 16-round DES cipher with 247 known-plaintexts, respectively. Moreover, this method is applicable to an only-ciphertext attack in certain situations. For example, if plaintexts consist of natural English sentences represented by ASCII codes, 8-round DES cipher is breakable with 229 ciphertexts only.

Copyright information

© Springer-Verlag Berlin Heidelberg 1994

Authors and Affiliations

  • Mitsuru Matsui
    • 1
  1. 1.Computer & Information Systems LaboratoryMitsubishi Electric CorporationKamakura, KanagawaJapan

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