Soukayna Qarboua

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The nonlinearity of sequences is one of the important security measures for stream cipher systems. Recently, in the study of vectorized stream cipher systems, bent functions have been generalized to the alphabet ℤ q  = ℤ/qℤ and also studied by several authors. This generalization maps the classical definition of binary bent functions to generalized bent(More)
To design robust symmetric encryption schemes, we need to use Boolean functions with suitable properties. Among the security criteria these functions need to fulfill, we can mention algebraic immunity. A lot of papers study how to construct suitable functions, but some of them assume the validity of Tu-Deng's combinatorial conjecture [2] to estimate the(More)
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