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The 128-bit block cipher TWIS was proposed by Ojha et al in 2009. It is a lightweight block cipher and its design is inspired from CLEFIA. In this paper, we first study the properties of TWIS structure, and as an extension we also consider the generalized TWIS-type structure named G-TWIS cipher whose block size and round number are 4m and n repectively, where n and m are any positive integers. Then...
The security of ARIA against integral attack is analyzed in this paper. First we modify the 3-round integral distinguishers proposed by Li et al., and by analyzing the property of the diffusion layer of ARIA we present new 4-round integral distinguishers. Moreover, based on the 4-round integral distinguishers and the partial sum technique we improve integral attack result on 6-round ARIA and propose...
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