Abstract
We propose a new known plaintext attack of FEAL cipher. Our method differs from previous statistical ones in point of deriving the extended key in definite way. As a result, it is possible to break FEAL-4 with 5 known plaintexts and FEAL-6 with 100 known plaintexts respectively. Moreover, we show a method to break FEAL-8 with 215 known plaintexts faster than an exhaustive search.
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CITATION STYLE
Matsui, M., & Yamagishi, A. (1993). A new method for known plaintext attack of FEAL cipher. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 658 LNCS, pp. 81–91). Springer Verlag. https://doi.org/10.1007/3-540-47555-9_7
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