A new image encryption method: parallel sub-image encryption with hyper chaos
A new image encryption method: parallel sub-image encryption with hyper chaos
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DOI：
10.1007/s11071-011-0006-6
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发表时间：
2012-01-01
影响因子：
5.6
通讯作者：
Irani, Hassan
中科院分区：
文献类型：
--
作者：
Mirzaei, Omid;Yaghoobi, Mahdi;Irani, Hassan
提出了一种基于全置乱并行加密算法的图像加密方案。在加密算法中引入了两个混沌系统，混淆了明文和密文之间的关系。为了使加密过程更加复杂和混乱，首先将原始图像分成4个子图像，然后根据Logistic映射伪随机地改变每个子图像的位置。接着，使用总置乱矩阵来置乱整个图像中的像素的位置，然后以并行方式同时加密子图像。在USC数据库上的实验结果表明，该加密算法具有时间复杂度低、密钥空间大、安全性高等优点。此外，这种局部加密方法的鲁棒性比其他加密方案更强，并且加密图像中的灰度值分布具有类似随机的行为。
A new image encryption scheme, based on a total shuffling and parallel encryption algorithm is proposed in this paper. Two chaotic systems have been used in the encryption algorithm to confuse the relationship between the plain-image and the cipher-image. To make the encryption procedure more confusing and complex, the plain-image is first divided into 4 sub-images and then the position of each sub-image is changed pseudo-randomly according to a logistic map. Next, a total shuffling matrix is used to shuffle the position of pixels in the whole image and then sub-images are encrypted simultaneously in a parallel manner. The experimental results on USC data base demonstrate that the proposed encryption algorithm has a low time complexity and has the advantages of large key space and high security. Moreover, the robustness of this locally encryption method is much more in contrast with other encryption schemes and the distribution of gray values has a random-like behavior in the encrypted image.