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Asymmetric pixel confusion algorithm for images based on RSA and Arnold transform
Frontiers of Information Technology & Electronic Engineering ( IF 3 ) Pub Date : 2020-12-23 , DOI: 10.1631/fitee.2000241
Xiao-ling Huang , You-xia Dong , Kai-xin Jiao , Guo-dong Ye

We propose a new asymmetric pixel confusion algorithm for images based on the Rivest-Shamir-Adleman (RSA) public-key cryptosystem and Arnold map. First, the RSA asymmetric algorithm is used to generate two groups of Arnold transform parameters to address the problem of symmetrical distribution of Arnold map parameters. Second, the image is divided into blocks, and the first group of parameters is used to perform Arnold confusion on each sub-block. Then, the second group of parameters is used to perform Arnold confusion on the entire image. The image correlation is thereby fully weakened, and the image confusion degree and effect are further enhanced. The experimental results show that the proposed image pixel confusion algorithm has better confusion effect than the classical Arnold map based confusion and the row-column exchange based confusion. Specifically, the values of gray difference are close to one. In addition, the security of the new confusion operation is dependent on RSA, and it can act as one part of a confusion-substitution structure in a cipher.



中文翻译:

基于RSA和Arnold变换的图像非对称像素混淆算法。

我们提出了一种新的基于Rivest-Shamir-Adleman(RSA)公钥密码系统和Arnold映射的图像不对称像素混淆算法。首先,使用RSA非对称算法生成两组Arnold变换参数,以解决Arnold映射参数的对称分布问题。第二,将图像划分为块,然后使用第一组参数对每个子块执行Arnold混淆。然后,第二组参数用于对整个图像进行Arnold混淆。从而充分削弱了图像相关性,并且进一步增强了图像混淆度和效果。实验结果表明,与传统的基于Arnold映射的混淆和基于行-列交换的混淆相比,所提出的图像像素混淆算法具有更好的混淆效果。具体地,灰度差的值接近于1。此外,新的混淆操作的安全性取决于RSA,并且它可以充当密码中混淆替代结构的一部分。

更新日期:2020-12-23
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