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The two most important criteria for vectorial Boolean functions used asS-boxes in block ciphers are differential uniformity and nonlinearity. Previouswork in this field has focused only on nonlinearity and a different criterion,autocorrelation. In this paper, we describe the results of experiments in usingsimulated annealing, memetic algorithms, and ant colony optimisation to createvectorial Boolean functions with low differential uniformity.  Keywords: Metaheuristics, simulated annealing, memetic algorithms, ant colonyoptimization, cryptography, Boolean functions, vectorial Boolean functions.

Using evolutionary computation to create vectorial Boolean functions with low differential uniformity and high nonlinearity