Table 6 Selected S-Boxes Boolean functions nonlinearities.

From: A novel chaos-based approach for constructing lightweight S-Boxes

Boolean functions

\({f}_{1}\)

\({f}_{2}\)

\({f}_{3}\)

\({f}_{4}\)

ES S-Box NL

4

4

4

4

ELET S-Box NL

4

4

4

4