一种新的数字图像置乱方案

A New Scrambling Scheme of Digital Image

提出了一种新的数字图像置乱概念和模型 ,采用了矩阵的配对及移位操作技术。配对的选择方式和移位次数决定于离散Chebyshev映射系统生成的密钥混沌序列。混沌系统的特性使得该置乱方法具有随机性和变化的多样性。

A new scheme of scrambling digital image is proposed in this paper.Its concepts and models are described in detail.The scheme is based on matching pairs of the image matrix and shift operator.The discrete Chebyshev mapping is employed to generate secret key chaotic streams as scrambling parameters.With the properties of chaotic system,the proposed algorithm has the features of randomness as well as varieties for image scrambling.At last,the problem for security is discussed,and the test result is obtained efficiently.