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赵锋, 吴成茂. 自编码和超混沌映射相结合的图像加密算法[J]. 计算机辅助设计与图形学学报, 2016, 28(1): 119-128.
引用本文: 赵锋, 吴成茂. 自编码和超混沌映射相结合的图像加密算法[J]. 计算机辅助设计与图形学学报, 2016, 28(1): 119-128.
Zhao Feng, Wu Chengmao. Image Encryption Algorithm Combined Self-Encoded Theory with Super-Chaotic Mapping[J]. Journal of Computer-Aided Design & Computer Graphics, 2016, 28(1): 119-128.
Citation: Zhao Feng, Wu Chengmao. Image Encryption Algorithm Combined Self-Encoded Theory with Super-Chaotic Mapping[J]. Journal of Computer-Aided Design & Computer Graphics, 2016, 28(1): 119-128.

自编码和超混沌映射相结合的图像加密算法

Image Encryption Algorithm Combined Self-Encoded Theory with Super-Chaotic Mapping

  • 摘要: 为了提高图像加密结果的安全性,提出一种自编码、混沌和超混沌相结合的图像加密算法.该算法利用主控密钥确定改进的离散Henon映射参数,并经多次迭代产生图像大小的中间密钥矩阵;对其自归回编码和Logistic混沌映射扰动产生随机序列;与二维离散超混沌映射产生的随机序列经改进的三维Lorenz可逆映射相融合形成复合密钥序列;对图像像素采用一种新的二维可逆积运算操作实现正反向扩散加密产生密文图像.实验结果表明,文中算法具有良好的加密性能,能明显地抵抗差分和选择明文等攻击.

     

    Abstract: To improve the security of image encryption results, a high performance algorithm of image encryption is proposed by combining self-encoded theory with chaotic and super-chaotic mappings. In the mast key control condition, this algorithm firstly uses discrete improved Henon mapping through repeated iteration to generate intermediate key matrix with plaintext image size, and the binary sequence of intermediate key matrix is self-coded into Gaussian white noise sequence by using the encoder based on automate regression model, moreover it is perturbed by logistic chaotic mapping and discreted to generate random sequence with high complexity. Secondly, two different random sequences, which are respectively produced by self-encoder and two-dimensional discrete hyper chaotic mapping, are fused to generate the composite key sequence by using three invertible improved chaotic mapping of three-dimensional discrete Lorenz system. In the end, the pixel values of plaintext image are achieved the positive and negative direction diffusion encryption to generate cipher image by making good use of new two-dimensional revertible mapping with product operation over finite integer field. The experimental results show that the proposed image encryption algorithm has good cryptographic properties, and can significantly resist differential and chosen plaintext attacks.

     

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