Journal
MULTIMEDIA TOOLS AND APPLICATIONS
Volume 81, Issue 28, Pages 40755-40773Publisher
SPRINGER
DOI: 10.1007/s11042-022-12621-9
Keywords
Image encryption; Cellular automata; SHA-256; Chaotic maps
Categories
Funding
- National Natural Science Foundation of China [61801131]
- Overseas 100 Talents Program of Guangxi Higher Education
- 2018 Guangxi One Thousand Young and Middle-Aged College
- University Backbone Teachers Cultivation Program
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A new image encryption algorithm is proposed in this study, using chaotic maps and Cellular Automata to increase the sensitivity to plain-images and enhance security.
Recent encryption schemes are not sensitive enough to plain-images, which leads to low robustness and easy vulnerability to attacks. By employing chaotic maps and Cellular Automata, a novel image encryption algorithm is proposed in this work to increase the sensitivity to plain-images and improve security. Firstly, initial values of the two-dimensional Logistic-Sine-Coupling Map and the Logistic-Sine-Cosine Map are calculated by the SHA-256 of the original image, and the process of diffusion is conducted. Secondly, the key matrices are produced by iterating chaotic maps in the process of permutation. The diffused image is scrambled by the index matrices, which are produced by sorting every row or column of the key matrices. Finally, the scrambled image is transformed into cipher-image by using Cellular Automata. Experimental results and theoretical analysis show that the proposed scheme has good security as it can effectively resist various attacks.
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