Abstract Substitution-boxes (S-boxes) are unique nonlinear elements, which are used to
achieve the property of confusion in modern symmetric ciphers and offer resistance to …

Cryptography often involves substituting (and converting) the secret information into dummy
data so that it could reach the desired destination without leakage. Within symmetric key …

This study adopted a metaheuristic approach based on the firefly algorithm (FA) optimization
to generate an appropriate configuration for an 8× 8 Substitution boxes (S-boxes). The FA …

A metaheuristic approach based on the nature-inspired and well-known Grey Wolf
Optimization algorithm (GWO) was employed in this study to design an approach for …

Substitution Boxes (S-Boxes) play an important role in many modern-day cryptographic
algorithms, more commonly known as ciphers. Without carefully chosen S-Boxes, such …

Substitution boxes are the main nonlinear component of block ciphers. The security of these
ciphers against linear, differential, or side-channel attacks is dependent on the design of …

S-box is the main security component in lightweight block ciphers. Finding new algorithms
and technical applications to generate S-box is still a current research topic. We proposed …

This work investigates the development of an improved cost function specifically designed
for the rapid generation of highly nonlinear substitution or S-boxes, a key component in …

The construction of substitute box (S-box) has always been an important research direction
in cryptography. This paper proposes a new S-box generation method and advanced design …

S-boxes play an important role in ensuring the resistance of block ciphers against
cryptanalysis as often they are their only nonlinear components. The cryptographic …