Improvement of hill's classical method in image cryptography
Improvement of hill's classical method in image cryptography
复制标题
图像密码学中希尔经典方法的改进
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
A. Jarjar
中科院分区：
文献类型：
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作者：
A. Jarjar
在本文中，我们将介绍一种新的彩色图像加密算法。这些图像具有任意大小(n，m)。该技术基于两个混沌映射的耦合，即物流映射和PWLCM映射。这两个映射由秘密函数f构造和合并，该函数将区间[0，1]中的两个实数转换为相同区间的数a实数。对于混淆，我们将使用对Hill的经典方法的改进。这种改进不是别人，而是一种仿射变换，它由环Z/256Z上系数为三的方阵保证。对于这个可逆矩阵，我们添加一个混沌平移向量，这个动态向量在每次迭代中被环Z/256Z中系数为任意阶树的另一个矩阵修改。最后将Z/3nmZ环上的混沌置换应用到整个彩色图像中，为了避免任何差分攻击，将设置一个新的操作模式
In this paper, we will introduce a new color image encryption algorithm. These images are of arbitrary sizes (n, m). This technique is based on a coupling of two chaotic maps; Namely, the logistics map and the PWLCM map. These two maps constructed and merged by a secret function f; which transforms two real from the interval [0 1] into number a real of the same interval. For confusion, we will use an improvement of the classical method of HILL. This improvement is none other than an affine transformation assured by a square matrix of order three with coefficient in the ring Z / 256Z. To this invertible matrix; we add a chaotic translation vector, this dynamic vector is modified at each iteration by another matrix of any order tree with coefficient in the ring Z / 256Z. A chaotic permutation in the ring Z / 3nmZ will be applied to the entire color image Finally, to avoid any differential attack, a new operating mode will be installed.The simulations carried out on the whole database showed that our new encryption technique is protected against any known attack