A computationally efficient image encryption technique using a 4D chaotic system (CIE4DC) in a dynamic network
Jashwant Samar, Shailja Sharma, Ankur Khare · 2025
This chapter addresses the limitations of current image encryption techniques, most of which operate in the multidimensional realm, potentially compromising pixel correlations. A computationally efficient image encryption technique using a 4D chaotic system (CIE4DC) offers a promising solution by integrating two key components: the Discrete Cosine Transform (DCT) and a Confusion-Diffusion Scheme (CDS) with a 4D chaotic system. The practice of DCT for renovating images into the frequency realm is a significant advantage, as it preserves pixel correlations and enhances image security. The CDS is employed to ensure essential protection characteristics, including substitution and permutation, which are vital for robust encryption. Furthermore, the CDS offers an advantage over asymmetric cryptosystems, thanks to its efficient and minimum complexity actions, leading to quicker encryption. To validate the usefulness and safety of the CIE4DC, the chapter conducts various arithmetical tests and protection examinations on images. These assessments collectively support the claim that the CIE4DC is a reliable and secure method for protecting image data, offering a valuable contribution to the field of image encryption in terms of key sensitivity, key length protection, histogram examination, information entropy examination, and encryption time in contrast to various prior research works.