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A Fast Chaotic Image Encryption Scheme With Simultaneous Permutation-Diffusion Operation

机译:具有同步置换扩散操作的快速混沌图像加密方案

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摘要

In this paper, a secure and fast chaotic image encryption scheme with simultaneous permutation-diffusion operation is proposed. We combine permutation and diffusion processes into a whole, namely, simultaneous permutation and diffusion operation (SPDO). This can solve the problem of traditional encryption scheme in which the permutation and diffusion are two independent processes, that leads attackers to crack the two processes separately. In SPDO, the initial value of the current Sine-Sine chaotic map is related to the secret keys and the previous encrypted pixels' values. In this case, the proposed scheme can generate dynamic key streams and indexes that are related to plaintext, which improves the sensitivity to plaintext for the encryption scheme. In addition, the pixel values are processed by row and column (row-level and column-level) during the encryption procedure. Thus, the proposed scheme presents lower time complexity and faster running speed compared with bit-level or pixel-level image encryption schemes, which makes the proposed scheme be conducive to the batch transmission and real-time transmission of digital images. The simulation results and security analysis show that our scheme can resist common attacks, such as statistical attack, differential attack, chosen plaintext attack and other comprehensive attacks.
机译:本文提出了一种具有同时置换扩散操作的安全和快速混沌图像加密方案。我们将置换和扩散过程组合成一个整体,即同时置换和扩散操作(SPDO)。这可以解决传统加密方案的问题,其中排列和扩散是两个独立的过程,这导致攻击者分别破解两个过程。在SPDO中,当前正弦混沌映射映射的初始值与秘密密钥和先前的加密像素值相关。在这种情况下,所提出的方案可以生成与明文相关的动态密钥流和索引,这提高了对加密方案的明文的灵敏度。另外,在加密过程期间,通过行和列(行级和列级)处理像素值。因此,与比特级或像素级图像加密方案相比,所提出的方案呈现更低的时间复杂性和更快的运行速度,这使得所提出的方案有利于数字图像的批量传输和实时传输。仿真结果和安全分析表明,我们的计划可以抵抗常见的攻击,如统计攻击,差异攻击,选择明文攻击等综合攻击。

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