A Compact 16-bit S-box over Tower Field $\F_{(((2^2)^2)^2)^2}$ with High Security

Bahram Rashidi, Behrooz Khadem

This paper introduces a compact and secure 16-bit substitution box (S-box) designed over the composite field $\F_{(((2^2)^2)^2)^2}$, optimized for both hardware efficiency and cryp…