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Linear cryptanalysis method for DES cipher

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (1994) 765 LNCS 386-397
DOI: 10.1007/3-540-48285-7_33
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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.

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Matsui, M. (1994). Linear cryptanalysis method for DES cipher. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 765 LNCS, pp. 386–397). Springer Verlag. https://doi.org/10.1007/3-540-48285-7_33

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