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THE DIFFERENTIAL SPECTRUM OF A CLASS OF POWER FUNCTIONS OVER FINITE FIELDS

机译:在有限字段上一类功率函数的差分谱

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摘要

Functions with good differential-uniformity properties have important applications in coding theory and sequence design in addition to the applications in cryptography. The differential spectrum of a cryptographic function is useful for estimating its resistance to some variants of differential cryptanalysis. The objective of this paper is to determine the differential spectrum of the power function x(p2k)-p(k)+1 over F-pn, where p is an odd prime, n; k; e are integers with gcd(n, k) = e and n/e being odd. In particular, when n is odd and e = 1, our result includes a recent one (IEEE Trans. Inform. Theory 65(10): 6819-6826) as a special case.
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