基于m序列变换和混沌映射的图像加密算法

该文利用m序列发生器中移位寄存器状态的遍历性(全零状态除外),首次提出一种"m序列变换"用于图像位置置乱的方法.并利用混沌映射系统具有初值敏感性,参数敏感性和类随机性的特点,设计了一种基于"m序列变换"与混沌映射相结合的图像加密算法,与其它图像加密算法相比,该算法的密钥空间非常巨大,具有更好的安全性.

Image Encryption Algorithm Based on m-Sequence Transform and Chaos Map

Based on the ergodicity of the shifters (except for all zero-states) in m-sequence generator, in this paper a new ?m-sequence transform? method is first proposed to apply to image position permutation. Combining this method with chaotic map, a novel image encryption approach is presented, and some simulating results are shown in this paper. Comparing with the existing encryption methods, the approach is not only of the characteristics of chaotic map with initial value sensitivity, parameter sensitivity and random sensitivity, but also of more larger secret key space. Thus the approach is more security than other encryption methods.