A note on the spectral characterization of correlation immune Boolean functions
Information Processing Letters
Improved Upper Bound on the Nonlinearity of High Order Correlation Immune Functions
SAC '00 Proceedings of the 7th Annual International Workshop on Selected Areas in Cryptography
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IEEE Transactions on Information Theory
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IEEE Transactions on Information Theory
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CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
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INDOCRYPT '01 Proceedings of the Second International Conference on Cryptology in India: Progress in Cryptology
Journal of Complexity - Special issue on coding and cryptography
Discrete Applied Mathematics - Special issue: Coding and cryptography
Discrete Applied Mathematics - Special issue: Coding and cryptography
Computing partial Walsh transform from the algebraic normal form of a Boolean function
IEEE Transactions on Information Theory
WCC'05 Proceedings of the 2005 international conference on Coding and Cryptography
On bent and highly nonlinear balanced/resilient functions and their algebraic immunities
AAECC'06 Proceedings of the 16th international conference on Applied Algebra, Algebraic Algorithms and Error-Correcting Codes
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ACISP'05 Proceedings of the 10th Australasian conference on Information Security and Privacy
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INDOCRYPT'04 Proceedings of the 5th international conference on Cryptology in India
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SETA'06 Proceedings of the 4th international conference on Sequences and Their Applications
Counting Boolean functions with specified values in their Walsh spectrum
Journal of Computational and Applied Mathematics
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We use a general property of Fourier transform to obtain direct proofs of recent divisibility results on the Walsh transform of correlation immune and resilient functions. Improved upper bounds on the nonlinearity of these functions are obtained from the divisibility results. We deduce further information on correlation immune and resilient functions. In particular, we obtain a necessary condition on the algebraic normal form of correlation immune functions attaining the maximum possible nonlinearity.