Journal
SIGNAL PROCESSING
Volume 128, Issue -, Pages 155-170Publisher
ELSEVIER
DOI: 10.1016/j.sigpro.2016.03.021
Keywords
Image encryption; S-box; Permutation-substitution (SP) network; Chaotic systems
Categories
Funding
- Ministry of Higher Education and Scientific Research (Egypt-Tunisia Cooperation Program) [4-13 A1]
- Natural Science Foundation of Heilongjiang Province, China [QC2014C076, JJ2016ZR1068]
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In this paper, a novel image encryption approach based on permutation-substitution (SP) network and chaotic systems is proposed. It consists of four cryptographic phases: diffusion, substitution, diffusion and permutation. Firstly, a diffusion phase is proposed based on new chaotic map. Then, a substitution phase based on strong S-boxes followed by a diffusion phase based on chaotic logistic map are presented which will, in turn, significantly increase the encryption performance. Finally, a block permutation phase is accomplished by a permutation function to enhance the statistical performance of the proposed encryption approach. Conducted experiments based on various types of differential and statistical analyses show that the proposed encryption approach has high security, sensitivity and speed compared to previous approaches (C) 2016 Elsevier B.V. All rights reserved.
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