Abstract
ICEBERG is proposed by Standaert et al. in FSE 2004 for reconfigurable hardware implementations. ICEBERG is a fast involutional SPN block cipher and all its components are involutional and allow very efficient combinations of encryption/decryption. ICEBERG uses 64-bit block size and 128-bit key and the round number is 16. In this paper, we firstly find the best linear approximation of 6-round ICEBERG. We find that 2122 of ICEBERG keys are weak for linear cryptanalysis, and the linear deviation can be strengthened more heavily than the linear characteristic by the multi-path effect(Linear Hull). And we discover a 6-round linear hull consisting of 7 linear characteristics with a linear deviation of 2− 29.99. Then we give a linear attack against 7-round ICEBERG for the weak keys.
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Sun, Y., Wang, M. (2012). Linear Cryptanalysis of Reduced-Round ICEBERG. In: Ryan, M.D., Smyth, B., Wang, G. (eds) Information Security Practice and Experience. ISPEC 2012. Lecture Notes in Computer Science, vol 7232. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-29101-2_26
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DOI: https://doi.org/10.1007/978-3-642-29101-2_26
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