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A known-plaintext attack of FEAL-4 based on the system of linear equations on difference

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (1993) 739 LNCS 485-488
DOI: 10.1007/3-540-57332-1_43
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Abstract

I present a new attack of FEAL-4 blockcipher. The attack requires only 24 blocks of 8-byte randomly given known-plaintext. Using these blocks, we can break FEAL-4 with the probability of greater than 90%, in 14 seconds on a personal computer (cpu 80386 16MHz). It is based on the system of linear equations on the differences.

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Kaneko, T. (1993). A known-plaintext attack of FEAL-4 based on the system of linear equations on difference. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 739 LNCS, pp. 485–488). Springer Verlag. https://doi.org/10.1007/3-540-57332-1_43

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