Abstract
This paper proposes a nested (hierarchical) SPN structure and the symmetric block cipher “Hierocrypt”. In the nested SPN structure, lower-level SPN structures are recursively embedded into S-box positions in SPN of the higher level. This structure recursively assures the lower bound of active S-box number, and high security level is efficiently realized. The 8-round Hierocrypt is implemented in C language on Pentium III, and shows the middle-class performance of final AES candidates.
Cite
CITATION STYLE
Ohkuma, K., Muratani, H., Sano, F., & Kawamura, S. (2001). The block cipher Hierocrypt. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 2012, pp. 72–88). Springer Verlag. https://doi.org/10.1007/3-540-44983-3_6
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