一种新的基于魔方变换的数字图像置乱加密算法  

A novel algorithm of digital image scrambling and encryption based on magic cube transformation

作　　者：赵立龙[1] 方志良[1] 顾泽苍[1] 

机构地区：[1]南开大学现代光学研究所,光电信息技术教育部重点实验室,天津300071

出　　处：《光电子．激光》2008年第1期131-134,共4页Journal of Optoelectronics·Laser

基　　金：天津市重点科技攻关资助项目(O5YFGZGX09800)

摘　　要：提出一种基于魔方变换的数字图像置乱加密算法,突破了传统的不改变图像像素值、仅通过重新排列图像像素点的位置实现图像置乱加密的方法,在三维空间上实现了对图像数据的置乱加密,打破了原有图像的所有特征。提出了一种新的密钥与魔方变化的编码对应法则,使该加密算法的加密密钥不受类型、大小的限制,具有密钥空间大的特点。仿真结果表明,该算法具有很好的加密、解密结果。A new algorithm for digital image scrambling and encryption based on magic cube transformation is proposed. It is different from the general algorithm which implements image scrambling and encryption by rearranging the position of image pixels without changing the value of the pixels. The algorithm performs the image encryption in three-dimensional space and changes all the features of original image. A code rule of correspondence mapping from secret key to magic cube transformation is proposed,Which can realize that the secret key is not limited by both type and size,and the key space is huge. The result of simulation shows that the algorithm can give satisfactory result of encryption and decryption.

关 键 词：魔方变换 图像加密 三维置乱 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]