期刊
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
卷 20, 期 3, 页码 846-860出版社
ELSEVIER
DOI: 10.1016/j.cnsns.2014.06.032
关键词
Image encryption; Dynamic state variables selection; Pixel-swapping based confusion; Snake-like diffusion
类别
资金
- National Natural Science Foundation of China [61271350, 61374178, 61202085]
- Fundamental Research Funds for the Central Universities [N120504005]
- Liaoning Provincial Natural Science Foundation of China [201202076]
- Specialized Research Fund for the Doctoral Program of Higher Education [20120042120010]
- Ph.D. Start-up Foundation of Liaoning Province, China [20111001, 20121001, 20121002]
In recent years, a variety of chaos-based image cryptosystems have been investigated to meet the increasing demand for real-time secure image transmission. Most of them are based on permutation-diffusion architecture, in which permutation and diffusion are two independent procedures with fixed control parameters. This property results in two flaws. (1) At least two chaotic state variables are required for encrypting one plain pixel, in permutation and diffusion stages respectively. Chaotic state variables produced with high computation complexity are not sufficiently used. (2) The key stream solely depends on the secret key, and hence the cryptosystem is vulnerable against known/chosen-plaintext attacks. In this paper, a fast chaos-based image encryption scheme with a dynamic state variables selection mechanism is proposed to enhance the security and promote the efficiency of chaos-based image cryptosystems. Experimental simulations and extensive cryptanalysis have been carried out and the results prove the superior security and high efficiency of the scheme. (C) 2014 Elsevier B.V. All rights reserved.
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