Differences with high probability and impossible differentials for the KB-256 cipher

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发表日期：

2024年7月8日

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R. Astrakhantsev,
A. Chuhno,
A. Dmukh,
A. Kurochkin,
I. Astrakhantseva

摘要

In this paper differences with probability 1 were found for 6 and 7 rounds of KB-256 block cipher. Also using Biham’s et al. shrinking technique we find more than 1700 impossible differentials for the KB-256 cipher with number of rounds from 8 up to 18 (2 rounds more than in the original KB-256)