Baker映射的三维扩展及其在多媒体加密中的应用  

3D extension of Baker map and its application to multimedia information encryption

作　　者：廉士国[1] 茅耀斌[1] 王执铨[1] 

机构地区：[1]南京理工大学自动化系,江苏南京210094

出　　处：《控制与决策》2004年第6期714-717,共4页Control and Decision

基　　金：国家自然科学基金资助项目(60174005);教育部博士点基金资助项目(20020288025).

摘　　要：对Baker映射进行三维扩展,提出一种基于三维混沌映射的混沌加密方案.与二维映射相比,扩展后的三维Baker映射具有更大的密钥空间、更快的混迭速度和更广的应用范围.这种三维Baker映射与扩散函数相结合,增加了密码强度,起到良好的加密作用.实验结果表明,与传统基于数论的DES加密算法相比,该算法具有更快的速度,更适合于多媒体数据的加密.Baker map is proposed to 3D space and a Baker map based encryption scheme is proposed. Compared to 2D Baker map, the extended 3D Baker map has much larger key space, much faster mixing speed and much wider applications such as the encryption of images, videos or multi-spectral image sequences. The encryption scheme combining the extended Baker map with spreading functions is of high security. And experiments show that the algorithm is much faster than DES, which makes it more suitable for multimedia encryption.

关 键 词：BAKER映射 混沌加密 图像加密 多媒体信息加密 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]