The expansion of worldwide networking has created new possibilities for management,
development, and presentation in the form of digital data. The uncomplicated accessibility to …

In the modern block cipher, the substitution box (S-box) is a nonlinear constituent that plays
a substantial role to create the confusion in ciphertext. S-boxes with low value of differential …

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 …

Chacha20 is a widely used stream cipher known for using permutation functions to enhance
resistance against cryptanalysis. Although the existing literature highlights its strengths, it is …

Block ciphers are widely used for securing data and are known for their resistance to various
types of attacks. The strength of a block cipher against these attacks often depends on the S …

In the field of secure communications, the robustness of cipher images transmitted in various
channels is becoming increasingly important. In this paper, a robust image encryption …

The significance of data security has become more critical due to the ever-changing goals
and capabilities of attackers. As a result, many cryptosystems employing diverse …

This study presents a method based on elementary logic and arithmetic operations to
enhance the cryptographic properties of Substitution Boxes (S-Boxes). S-Boxes are a crucial …

Substitution boxes (S-Boxes) are essential elements of modern block ciphers, serving as
non-linear characteristics that enhance the resistance of these ciphers against cryptanalysis …

As the number of hacking events and cyber threats keeps going up, it is getting harder and
harder to communicate securely and keep personal information safe on the Internet …