Integral attacks on reduced-round ARIA block cipher

Abstract

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 integral attack on 7-round ARIA. The results are the best integral attack results on reducedround ARIA so far. © Springer-Verlag Berlin Heidelberg 2010.