Color Image Encryption Using Angular Graph Fourier Transform

被引:0
|
作者
Yang, Liuqing [1 ]
Meng, Wei [1 ]
Zhao, Xudong [2 ]
机构
[1] Beijing Forestry Univ, Engn Res Ctr Forestry Oriented Intelligent Inform, Natl Forestry & Grassland Adm, Beijing, Peoples R China
[2] Beijing Inst Technol, Beijing, Peoples R China
关键词
Angular Transform; Chaotic Sequence; DNA Coding; Graph Fourier Transform; Graph Signal Processing; Image Encryption; Random Walk; Sparse Decomposition; OPTICAL ENCRYPTION; PLAINTEXT ATTACK; HYPER-CHAOS; ALGORITHM;
D O I
10.4018/IJDCF.20210501.oa5
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
In this paper, an angular graph Fourier transform (AGFT) is introduced to encrypt color images with their intrinsic structures. The graph Fourier transform (GFT) is extended to the AGFT and proven to have the desired properties of angular transform and graph transform. In the proposed encryption method, color images are encoded by DNA sequences and confused under the control of chaotic key streams firstly. Secondly, sparse decomposition based on the random walk is applied to scramble pixels spatially, and a series of sub-images are obtained. This step increases encryption efficiency. Finally, the intrinsic sub-image structure is reflected by graphs, and the signals on different subgraphs are transformed into different AGFT domains with particular angular parameters, which makes the proposed method relevant to the original image structure and enhances security. The experimental results demonstrate that the proposed algorithm can resist various potential attacks and achieve better performance than the state-of-the-art algorithms.
引用
收藏
页码:59 / 82
页数:24
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