Table 4 Nonlinearity results of proposed S-boxes.

From: Multiple color images security by SPN over the residue classes of Gaussian integer \(\:Z{\left[i\right]}_{h}\)

S-boxes

\(\:{f}_{1}\)

\(\:{f}_{2}\)

\(\:{f}_{3}\)

\(\:{f}_{4}\)

\(\:{f}_{5}\)

\(\:{f}_{6}\)

\(\:{f}_{7}\)

\(\:{f}_{8}\)

A

106.0

108.0

108.0

104.0

108.0

106.0

108.0

108.0

B

106.0

106.0

108.0

108.0

106.0

106.0

108.0

106.0

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