基于二维分段线性映射的图像加密方法

Image Encryption Method Based on Two-Dimensional Piecewise Linear Maps

提出了二维分段线性映射,证明了该映射是混沌的.利用映射生成图像加密时所需的随机矩阵与随机序列,通过对原图像进行异或运算和循环移位运算,达到加密图像的目的.该方法简单、实用,实验结果表明:加密结果图像具有良好的加密效果和较高的安全性.

Put forward two-dimensinal piecewise linear maps,demonstrate the maps are chaotic.Use the maps to get the random matrixs and random sequences which are needed to encrypt images,reach the destination of encrypt processing by using xor operation and circular shifting operation.The method is simple and practical,experimental show that the effect of encrypted image is good and has higher security.