Herman Isa

Mr. Herman Isa

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Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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14 January 2023 in Mathematics
Verified
Journal Article
Open access
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HIHerman Isa
Herman Isa
Syed Mohamed AljunidSyed Mohamed Aljunid
Syed Mohamed Aljunid
MZMuhammad Reza Z’aba
Muhammad Reza Z’aba
REROSDISHAM ENDUT
ROSDISHAM ENDUT
SASYED Mohammad Ammar
SYED Mohammad Ammar
Norshamsuri AliNorshamsuri Ali
Norshamsuri Ali
A Substitution box (S-box) is an important component used in symmetric key cryptosystems to satisfy Shannon’s property on confusion. As the only nonlinear operation, the S-box must be cryptographically strong to thwart any cryptanalysis tools on cryptosystems. Generally, the S-boxes can be constructed using any of the following approaches: the random search approach, heuristic/evolutionary approach or mathematical approach. However, the current S-box construction has some drawbacks, such as low cryptographic properties for the random search approach and the fact that it is hard to develop mathematical functions that can be used to construct a cryptographically strong S-box. In this paper, we explore the non-permutation function that was generated from the binomial operation of the power function to construct a cryptographically strong S-box. By adopting the method called the Redundancy Removal Algorithm, we propose some enhancement in the algorithm such that the desired result can be obtained. The analytical results of our experiment indicate that all criteria such as bijective, nonlinearity, differential uniformity, algebraic degree and linear approximation are found to hold in the obtained S-boxes. Our proposed S-box also surpassed several bijective S-boxes available in the literature in terms of cryptographic properties.