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首页> 外文期刊>The international arab journal of information technology >Chaotic Encryption Scheme Based on a Fast Permutation and Diffusion Structure
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Chaotic Encryption Scheme Based on a Fast Permutation and Diffusion Structure

机译：基于快速排列和扩散结构的混沌加密方案

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摘要

The image encryption architecture presented in this paper employs a novel permutation and diffusion strategy based on the sorting of chaotic solutions of the Linear Diophantine Equation (LDE) which aims to reduce the computational time observed in Chong's permutation structure. In this scheme, firstly, the sequence generated by the combination of Piece Wise Linear Chaotic Map (PWLCM) with solutions of LDE is used as a permutation key to shuffle the sub-image. Secondly, the shuffled sub-image is masked by using diffusion scheme based on Chebyshev map. Finally, in order to improve the influence of the encrypted image to the statistical attack, the recombined image is again shuffle by using the same permutation strategy applied in the first step. The design of the proposed algorithm is simple and efficient, and based on three phases which provide the necessary properties for a secure image encryption algorithm. According to NIST randomness tests the image sequence encrypted by the proposed algorithm passes all the statistical tests with the high P-values. Extensive cryptanalysis has also been performed and results of our analysis indicate that the scheme is satisfactory in term of the superior security and high speed as compared to the existing algorithms.
机译：本文提出的图像加密体系结构采用了一种新颖的置换和扩散策略，该策略基于对线性Diophantine方程（LDE）的混沌解进行排序，目的是减少Chong置换结构中的计算时间。在该方案中，首先，将分段明智线性混沌映射（PWLCM）与LDE解的组合生成的序列用作置换键，以对子图像进行混洗。其次，利用基于切比雪夫图的扩散方案对混洗后的子图像进行掩蔽。最后，为了提高加密图像对统计攻击的影响，通过使用第一步中使用的相同排列策略，再次对重新组合的图像进行混洗。所提出算法的设计简单有效，并且基于三个阶段，这三个阶段为安全图像加密算法提供了必要的属性。根据NIST随机性测试，该算法加密的图像序列通过了所有具有高P值的统计测试。还进行了广泛的密码分析，我们的分析结果表明，与现有算法相比，该方案在安全性和高速性方面令人满意。

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