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首页> 外文期刊>Neural computing & applications >A chaotic image encryption algorithm based on 3-D bit-plane permutation
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A chaotic image encryption algorithm based on 3-D bit-plane permutation

机译：一种基于三维比特平面排列的混沌图像加密算法

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摘要

There are two shortcomings existing in the current color image encryption. One is that high correlation between R, G, B components of the original image may be neglected, the other is that the encryption has little relationship with the plain image, and then it is vulnerable to be broken. In order to solve these two problems and present secure and effective image encryption scheme, we introduce a novel chaos-based image encryption algorithm for color images based on three-dimensional (3-D) bit-plane permutation. In the proposed algorithm, the color plain image is firstly converted to 24 bit planes by RGB splitting and bit plane decomposition, next three-dimensional bit-plane permutation is performed on bit planes, position sequences for permutation are obtained from the 3D Chen chaotic system, and then the three confused components are gotten. Secondly, three key matrices are generated by a 1D chaotic system and a multilevel discretization method, and finally, the color cipher image is obtained by diffusing the confused components using key matrices. The SHA 256 hash function value of the plain image is obtained and combined with the given parameters to calculate the parameters and initial values of the chaotic system, so that the proposed scheme highly depends on the plain image and it may effectively withstand known-plaintext and chosen-plaintext attacks. Simulation results and security analyses demonstrate that our algorithm not only has good encryption effect, but can also resist against common attacks, so it is reliable to be applied for image secure communications.
机译：当前彩色图像加密存在两个存在的缺点。一个是，可以忽略原始图像的R，G，B分量之间的高相关，另一个是加密与普通图像没有很小的关系，然后它很容易被破坏。为了解决这两个问题并呈现安全有效的图像加密方案，我们基于三维（3-D）比特置换的彩色图像引入一种基于混沌的图像加密算法。在所提出的算法中，通过RGB分离和比特平面分解首先将彩色普通图像转换为24位平面，在比特平面上执行下一三维比特平面置换，从3D陈混沌系统获得置换的位置序列，然后已经获得了三个混淆的组成部分。其次，三个密钥矩阵由1D混沌系统和多级离散化方法产生，最后，通过使用密钥矩阵扩散混淆的组件来获得颜色密码图像。获得普通图像的SHA 256散列函数值并与给定的参数组合以计算混沌系统的参数和初始值，使得所提出的方案高度取决于普通图像，并且它可以有效地承受已知的明文和选择 - 明文攻击。仿真结果和安全分析表明，我们的算法不仅具有良好的加密效果，而且还可以抵抗普通攻击，因此应用于图像安全通信是可靠的。

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