魔方变换及其在数字图像加密中的应用

提出了一种新的数字图像置乱方法：魔方变换，结合非线性动力学系统的Logistic映射。设计了基于魔方变换的图像加密／解密算法，首先由密钥生成得到自然数据混沌序列，以此序列为参数对图像矩阵进行魔方变换后得到加密图像，解密算法是加密算法的逆过程，实验结果表明，该算法能够得到令人满意的结果。

MAGIC CUBE TRANSFORMATION AND ITS APPLICATION IN DIGITAL IMAGE ENCRYPTION

In this paper, a new method for digital image scrambling transformation, namely Magic Cube Transformation, is proposed. Combined with the Logistic mapping in non-linear dynamics system, an image encrypting and decrypting algorithm based on Magic Cube Transformation is designed. Firstly, a natural chaotic sequence is created with the key. With this chaotic sequence, the image matrix is transformed to an encrypted image by Magic Cube Transformation. The decrypting operation is the reverse process of encryption. The results indicate that the proposed algorithm can get satisfying effect. Finally, the characteristics of the algorithm are summarized and the aspects of the subsequent work are prospected.