Abstract
IDEA is a 64-bit block cipher with a 128-bit key designed by J. Massey and X. Lai. At FSE 2002 a slightly modified version called IDEA-X was attacked using multiplicative differentials. In this paper we present a less modified version of IDEA we call IDEA-X/2, and an attack on this cipher. This attack also works on IDEA-X, and improves on the attack presented at FSE 2002.
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Raddum, H. (2003). Cryptanalysis of IDEA-X/2. In: Johansson, T. (eds) Fast Software Encryption. FSE 2003. Lecture Notes in Computer Science, vol 2887. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-39887-5_1
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DOI: https://doi.org/10.1007/978-3-540-39887-5_1
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