期刊
COMPLEXITY
卷 -, 期 -, 页码 -出版社
WILEY-HINDAWI
DOI: 10.1155/2019/7485621
关键词
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资金
- Fundamental Research Funds for the Central Universities [JBK1902029, JBK1802073, JBK170505]
- Sichuan Science and Technology Program [19ZDYF0040]
- Natural Science Foundation of China [71473201]
- Scientific Research Fund of Sichuan Provincial Education Department [17ZB0433]
As one of the most widely used media types, images play an important role in the era of the Internet. And hence how to enhance the security of images has become a hot topic in the field of information security. However, due to some intrinsic characteristics of images, image security is still a challenging task. For the purpose of coping with this issue, in this paper, we propose a novel algorithm that combines a hyperchaotic system, dynamic filtering, and bit cuboid operations, namely, DFBC, for image encryption. Specifically, the proposed DFBC consists of four steps: firstly, a 7D Lorenz hyperchaotic system is utilized to generate a pseudorandom sequence; secondly, variable 1D filters are derived from the pseudorandom sequence, and dynamic filtering is conducted on each pixel of an image; thirdly, a diffusion scheme is performed and then the image is transformed to a bit cuboid; and, finally, various types of permutation (rearranging, symmetry, rotation, zigzag, and global bit permutation) are performed on the bit cuboid. The experiments on several testing images demonstrate that the DFBC achieves state-of-the-art results in terms of several evaluation criteria, showing that the DFBC is promising for image encryption.
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