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 …

The cryptanalytic resistance of modern block and stream encryption systems mainly
depends on the substitution box (S-box). In this context, the problem is thus to create an S …

We study the probability distributions of difference propagation probabilities and input-output
correlations for functions and block ciphers of given dimensions, for several of them for the …

Chaotic maps play a vital role in the development of cryptographic techniques being used in
today's world. Efficient and highly secure algorithms can be constructed based on chaotic …

Cellular Automata (CA) represent an interesting approach to design Substitution Boxes (S-
boxes) having good cryptographic properties and low implementation costs. From the …

Often the S-boxes are the only nonlinear components in a block cipher and as such play an
important role in ensuring its resistance to cryptanalysis. Cryptographic properties and …

Confusion is one of the most important component of modern block ciphers. The security of
modern encryption scheme is based on substitution and permutation network (SP-network) …

Most of the block ciphers contain substitution-boxes as their cornerstone primitive to add
requisite nonlinearity. S-boxes are responsible to ensure strong confusion and resistance to …

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 …