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Bounds on the Differential Branch Number of Permutations
Permutation S-box differential branch number
2017/10/12
Nonlinear permutations (S-boxes) are key components in block ciphers. Differential branch number measures the diffusion power of a permutation. Differential branch number of nonlinear permutations of ...
Feistel Like Construction of Involutory Binary Matrices With High Branch Number
Diffusion layer bitslice cipher hash function
2016/12/12
In this paper, we propose a generic method to construct involutory binary matrices from a three round Feistel scheme with a linear round function. We prove bounds on the maximum achievable branch numb...
We propose a family of 6-to-4-bit S-boxes with linear branch number 3. Since they also fulfill various further desirable properties, such S-boxes can serve as a building block for various block cipher...