Fatma Buyuksaraqoglu

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Recently proposed block ciphers like AES, Square, Shark use S-boxes that are based on inversion mapping over a Unite field F = CF(p"). Because of the simple algebraic structure of S-boxes generated in this way, these ciphers usually use a bitwise affine transformation after the inversion mapping. In this study, we show how we obtain algebraic expression of(More)
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