Substitution boxes are the key factor in symmetric-key cryptosystems that determines their
ability to resist various cryptanalytic attacks. Creating strong substitution boxes that have …

Substitution-boxes are the main deciding components in symmetric-key cryptosystems for
resisting many cryptanalytic attacks. It has been a challenging task for the designers to …

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 …

An efficient algorithm named chaotic multi-swapping and simulated annealing (CMSSA) for
obtaining cryptographically strong 8× 8 S-boxes is presented. The method is based on …

With the exponential increase in communication sector, the risk of information management
also increases. Although there is enormous input from the cybersecurity perspective, still a …

Substitution boxes are essential nonlinear components responsible to impart strong
confusion and security in most of modern symmetric ciphers. Constructing efficient S-boxes …

A substitution box (S‐box) plays a central role in cryptographic algorithms. In this paper, an
efficient method for designing S‐boxes based on chaotic maps is proposed. The proposed …

A substitution box (S-box) plays a central role in cryptographic algorithms. In this paper, an
efficient method for designing S-boxes based on chaotic maps is proposed. The proposed …

Substitution boxes are integral parts of most of the conventional block ciphering techniques
such as DES, AES, IDEA, etc. The strengths of these encryption techniques solely depend …

Substitution-boxes, or simply S-boxes, are used to increase confidentiality in the substitution
stage of most cryptosystem approaches. In this paper, an efficient method for the …