摘要
为设计高效的、加密性能好的图像加密系统,充分结合混沌映射细胞自动机的良好加密性能,提出了一种基于3D混沌映射和2D二阶细胞自动机的图像加密方案。该算法先利用3D混沌映射对图片像素进行置乱,然后利用2D二阶细胞自动机对图像在比特级别进行更进一步的混淆。该算法属于对称密钥加密,具有较大的密钥空间和并行化的加解密过程。实验结果证明,该算法可以在较小的迭代次数内达到良好的加密效果,不会导致密文扩张,且加密结果能够抵御常见的暴力破解攻击、统计分析攻击和差分攻击,具有较高的安全性。
To design a high efficiency and good performance image encryption system,a novel scheme was proposed based on 3D chaos map and 2D second order cellular automata.In this algorithm,image pixels are permuted using 3D cat chaos map.Then in diffusion stage,each pixel value in bit level is permuted using 2D second order cellular automata.This scheme belongs to the class of symmetric systems,which also has a large key space,and both encryption and decryption are parallel.The results of several experiments on brute force attack,statistical analysis and differential attack show that the scheme can achieve a high security in few iterations and won＇t enlarge the cipher image.
出处
《计算机科学》
CSCD
北大核心
2015年第7期182-185,203,共5页
Computer Science
