Optimal s-boxes against alternative operations

arXiv:2403.20059v1 Announce Type: new
Abstract: Civino et al. have characterised diffusion layers that expose an SPN to vulnerability from differential cryptanalysis when employing alternative operations coming from groups isomorphic to the translation group on the message space. In this study, we present a classification of diffusion layers that exhibit linearity in parallel alternative operations for ciphers with 4-bit s-boxes, enabling the possibility of an alternative differential attack simultaneously targeting all the s-boxes within the block. Furthermore, we investigate the differential …

arxiv classification coming cryptanalysis cs.cr expose math.gr message operations parallel space spn study translation vulnerability