Chaos-based partial image encryption scheme based on linear fractional and lifting wavelet transforms |
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| Affiliation: | 1. National Engineering School of Tunis, Tunisia;2. Mathematics Department, computer science laboratory, Faculty of Science, Menoufia University, Shebin El-Koom 32511, Egypt;3. Lumina-The University of South-East Europe, IT&C Department, Bucharest 021187, Romania;1. Universitat de Barcelona (UB), Facultat de Física, Departament de Física Aplicada, Martí i Franquès 1, 08028 Barcelona, Spain;2. Electrical and Computer Engineering Department, University of Connecticut, 371 Fairfield Road, Storrs, CT 06269-4157, USA;3. Universidad Complutense de Madrid, Facultad de Ciencias Físicas, Departamento de Óptica, Ciudad Universitaria s/n, 28040 Madrid, Spain;1. The School of Science, Hangzhou Dianzi University, Hangzhou, 310018 China;2. Department of Physics, Zhejiang University, Hangzhou, 310027 China;1. IETR/INSA of Rennes, Rennes, France;2. College of Information Technology and Computer Engineering, Palestine Polytechnic University, Hebron, Palestine;3. IETR Ecole polytech, University of Nantes, Rue Christian Pauc, 44306 Nantes cedex 3, France;1. Firat University, Department of Software Engineering, 23119 Elazig, Turkey;2. Firat University, Department of Computer Engineering, 23119 Elazig, Turkey;1. Department of Computer Science and Technology, Xi׳an Jiaotong University, Xi׳an 710049, China;2. The Genome Institute, Washington University in St. Louis, St. Louis, MO 63108, USA |
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| Abstract: | In this paper, a new chaos-based partial image encryption scheme based on Substitution-boxes (S-box) constructed by chaotic system and Linear Fractional Transform (LFT) is proposed. It encrypts only the requisite parts of the sensitive information in Lifting-Wavelet Transform (LWT) frequency domain based on hybrid of chaotic maps and a new S-box. In the proposed encryption scheme, the characteristics of confusion and diffusion are accomplished in three phases: block permutation, substitution, and diffusion. Then, we used dynamic keys instead of fixed keys used in other approaches, to control the encryption process and make any attack impossible. The new S-box was constructed by mixing of chaotic map and LFT to insure the high confidentiality in the inner encryption of the proposed approach. In addition, the hybrid compound of S-box and chaotic systems strengthened the whole encryption performance and enlarged the key space required to resist the brute force attacks. Extensive experiments were conducted to evaluate the security and efficiency of the proposed approach. In comparison with previous schemes, the proposed cryptosystem scheme showed high performances and great potential for prominent prevalence in cryptographic applications. |
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| Keywords: | Cryptography S-box Chaos Linear fractional transform Partial encryption Lifting-Wavelet Transform |
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