Since a substitution box (S-box) is the nonlinearity part of a symmetric key encryption
scheme, it directly determines the performance and security level of the encryption scheme …

Elliptic curve cryptography (ECC) is capable of providing high security than to other
cryptosystems with same key size. The aim of this paper is twofold. Firstly, we present new …

In this paper, a new chaos-based partial image encryption scheme based on Substitution-
boxes (S-box) constructed by chaotic system and Linear Fractional Transform (LFT) is …

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; …

A symmetric block cipher employing a substitution–permutation duo is an effective technique
for the provision of information security. For substitution, modern block ciphers use one or …

What makes artificial intelligence techniques so remarkable in the field of computer science
is undoubtedly their success in producing effective solutions to difficult computational …

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

The construction of substitution boxes (s-boxes) is an important research area in
cryptography. S-box is an important mathematical object. The aim of this study is to construct …

In this paper, we propose to present a novel technique for designing cryptographically
strong substitution-boxes using cubic polynomial map**. The proposed cubic polynomial …

Cryptography is commonly used to secure communication and data transmission over
insecure networks through the use of cryptosystems. A cryptosystem is a set of cryptographic …