Fifth generation (5G) networks are the base communication technology for connecting
objects in the Internet of Things (IoT) environment. 5G is being developed to provide …

Designing efficient and secure cryptosystems has been a preoccupation for many scientists
and engineers for a long time wherein they use chaotic systems to design new …

This paper is to design substitution boxes (S-Boxes) using innovative I-Ching operators
(ICOs) that have evolved from ancient Chinese I-Ching philosophy. These three operators …

In modern-day block ciphers, the role of substitution-boxes is to transform the plaintext data
nonlinearly to generate ciphertext data with sufficient confusion. It has been well-confirmed …

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 …

Image encryption schemes can be vulnerable to a variety of cryptanalysis attacks. The use of
key-dependent dynamic S-boxes has been shown to improve security. Threats of chosen …

In this work, an efficient image encryption based on S-boxes and fractional-order logistic
map is proposed. The features of the fractional-order chaotic system in dynamical behaviors …

A new method for obtaining strong S-boxes based on chaotic map and Teaching–Learning-
Based Optimization (TLBO) is presented in this paper. Our method presents eight rounds; …

Substitution box (S-box) is one of the most important components in the design of block
ciphers. In this work, different from traditional methods, we convert the construction of n× n S …

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