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A Novel Image Encryption Algorithm Based on Lifting-Based Wavelet Transform

机译：基于提升的小波变换的图像加密新算法

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摘要

In order to trade-off between computational effects and computational cost of present image encryption algorithm, a novel image encryption algorithm based on lifting-based wavelet transform is proposed in this paper. The image encryption process includes three steps: first the original image was divided into blocks, which were transformed by lifting based wavelet, secondly the wavelet domain coefficients were encryption by random mask which generated by user key, and finally employing Arnold scrambling to encrypt the coefficients. The security of proposed scheme is depended on the levels of wavelet transform, user key, and the times of Arnold scrambling. Theoretical analysis and experimental results demonstrate that the algorithm is favourable.
机译：为了权衡当前图像加密算法的计算效果和计算成本，提出了一种基于基于提升的小波变换的图像加密算法。图像加密过程包括三个步骤：首先将原始图像划分为块，然后通过基于提升的小波进行变换，然后通过用户密钥生成的随机掩码对小波域系数进行加密，最后利用Arnold加扰对系数进行加密。 。所提出方案的安全性取决于小波变换的级别，用户密钥和Arnold加扰的时间。理论分析和实验结果证明了该算法的优越性。

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