A new substitution-diffusion based image cipher using chaotic standard and logistic maps
A new substitution-diffusion based image cipher using chaotic standard and logistic maps
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DOI：
10.1016/j.cnsns.2008.11.005
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发表时间：
2009-07-01
影响因子：
3.9
通讯作者：
Sud, K. K.
中科院分区：
文献类型：
--
作者：
Patidar, Vinod;Pareek, N. K.;Sud, K. K.
本文提出了一种新的无损对称图像密码算法，该算法基于广泛使用的置换扩散结构，利用混沌标准映射和Logistic映射。它是专门为彩色图像而设计的，彩色图像是数据流的3D阵列。混沌标准映射的初始条件、系统参数和迭代次数共同构成了算法的密钥。第一轮替换/混淆是在从秘密密钥计算的中间异或密钥的帮助下实现的。然后，通过混合水平和垂直相邻像素的属性，分别完成两轮扩散，即水平和垂直扩散。在第四轮中，一个强大的替代/混淆是通过生成一个中间的混沌密钥流（CKS）图像在一个新的方式与混沌标准和逻辑映射的帮助下完成的。利用各种统计分析方法对所提出的图像加密技术的安全性和性能进行了深入的分析。密钥敏感性分析，差分分析，密钥空间分析，速度分析等。各种类型的分析结果是令人鼓舞的，并建议所提出的图像加密技术是能够管理之间的安全性和速度的权衡，因此适合于实时安全的图像和视频通信应用。(C)2008 Elsevier B. V.保留所有权利。
In this paper, we propose a new loss-less symmetric image cipher based on the widely used substitution-diffusion architecture which utilizes chaotic standard and logistic maps. It is specifically designed for the coloured images, which are 3D arrays of data streams. The initial condition, system parameter of the chaotic standard map and number of iterations together constitute the secret key of the algorithm. The first round of substitution/confusion is achieved with the help of intermediate XORing keys calculated from the secret key. Then two rounds of diffusion namely the horizontal and vertical diffusions are completed by mixing the properties of horizontally and vertically adjacent pixels, respectively. In the fourth round, a robust substitution/confusion is accomplished by generating an intermediate chaotic key stream (CKS) image in a novel manner with the help of chaotic standard and logistic maps. The security and performance of the proposed image encryption technique has been analyzed thoroughly using various statistical analysis. key sensitivity analysis, differential analysis, key space analysis,speed analysis,etc. Results of the various types of analysis are encouraging and suggest that the proposed image encryption technique is able to manage the trade offs between the security and speed and hence suitable for the real-time secure image and video communication applications. (C) 2008 Elsevier B.V. All rights reserved.