A new image encryption algorithm based on single S-box and dynamic encryption step

Wang, Ji Jun and Tan, Soo Fun (2021) A new image encryption algorithm based on single S-box and dynamic encryption step. [Experiment]

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Abstract

Chaotic-based S-box image encryption schemes promise to be a practical solution for securing digital images. However, the high-dimensional continuous chaotic has increased the algorithm’s complexity. Recent alternatives that focused on double or multiple S-boxes approaches, on the other hand, have been proven vulnerable to differential attacks. This paper presents an efficient and secure chaotic-based S-box image encryption scheme. Firstly, a single S-box with a size of 10 × 26 was constructed by using a low-dimensional chaotic system. Without a complex mathematical operation, the constructed single S-box has obvious efficiency advantages and achieved a higher image entropy rate than recent double or multiple S-boxes. Secondly, a new dynamic encryption step method is proposed to solve the high correlation and deterministic problems in multiple S-box encryptions. Under the control of the dynamic encryption step algorithm, it effectively destroys the correlation between the source image’s pixels. The experimental results and security analysis show that the proposed scheme enjoys higher security and is more efficient to secure digital images in real-world applications.

Item Type:	Experiment
Additional Information:	This paper presents a new chaotic-based S-box image encryption scheme, which employs a new low dimensional chaotic based single S-box and dynamic encryption step. Compared to recent chaotic-based S-box image encryption schemes that rely on the high-dimensional continuous chaotic system to strengthen their S-box security, which increased their algorithm complexity, we directed to apply a logistic map to generate a low dimensional chaotic sequence in constructing S-box structure. Our scheme has obvious efficiency advantages since it only involves a simple row-column transform process and eliminates heavy mathematical operations. The image entropy analysis results show that our scheme can achieve a better chaotic degree than recent works. Next, we introduced a dynamic encryption step technique to address the high correlation and deterministic issues in multiple S-box encryptions. Subsequently, pixel diffusion is used to change the statistical characteristics of the encrypted image.
Keyword:	Image encryption , Substitution box , S-box , Chaotic systems , Dynamic step
Subjects:	Q Science > QA Mathematics > QA1-939 Mathematics > QA71-90 Instruments and machines > QA75.5-76.95 Electronic computers. Computer science > QA76.75-76.765 Computer software
Department:	FACULTY > Faculty of Computing and Informatics
Depositing User:	SAFRUDIN BIN DARUN -
Date Deposited:	28 Feb 2022 15:32
Last Modified:	28 Feb 2022 15:32
URI:	https://eprints.ums.edu.my/id/eprint/31761

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