A Symmetric Chaos-Based Image Cipher with an Improved Bit-Level Permutation Strategy

Fu, Chong; Huang, Jun-Bin; Wang, Ningning; Hou, Qibin; Lei, Weimin

doi:10.3390/e16020770

Cited by 49 publications

(28 citation statements)

References 37 publications

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“…For example, the basic unit of an image can also be represented as bit (for example, a pixel value 54 can be represented as "00110110"). Some bit-level image encryption algorithms can be found in [22][23][24][25], which can play a permutation and diffusion effect simultaneously by a bit-level permutation. Zhu et al in [22] proposed an image cryptosystem employing the 2D Arnold map for bit-level permutation, and this cryptosystem can obtain diffusion effect and save some encryption time.…”

Section: Introductionmentioning

confidence: 99%

A Novel Image Encryption Scheme Using the Composite Discrete Chaotic System

Zhu

Zhang

et al. 2016

Entropy

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Abstract:The composite discrete chaotic system (CDCS) is a complex chaotic system that combines two or more discrete chaotic systems. This system holds the chaotic characteristics of different chaotic systems in a random way and has more complex chaotic behaviors. In this paper, we aim to provide a novel image encryption algorithm based on a new two-dimensional (2D) CDCS. The proposed scheme consists of two parts: firstly, we propose a new 2D CDCS and analysis the chaotic behaviors, then, we introduce the bit-level permutation and pixel-level diffusion encryption architecture with the new CDCS to form the full proposed algorithm. Random values and the total information of the plain image are added into the diffusion procedure to enhance the security of the proposed algorithm. Both the theoretical analysis and simulations confirm the security of the proposed algorithm.

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Section: Introductionmentioning

confidence: 99%

A Novel Image Encryption Scheme Using the Composite Discrete Chaotic System

Zhu

Zhang

et al. 2016

Entropy

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“…Therefore, the encryption time is substantially reduced. In [4][5][6][7], schemes with certain diffusion effect introduced in the permutation stage are proposed. As the pixel value mixing effect is contributed by both stages, the number of iteration rounds required by the diffusion procedure is reduced, and hence the performance of the cryptosystem is improved.…”

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confidence: 99%

A New Chaos-based Image Cipher Using a Hash Function

Fu¹,

Bian²,

Jiang³

et al. 2017

IJNDC

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This paper presents a new chaos-based image cipher using a plaintext-related permutation. The cat map and Lorenz system are employed to shuffle the positions of image pixels and generate the diffusion keystream, respectively. The control parameters of the cat map, i.e. the permutation key, are determined by the Murmur2 hash value of the original image. Owing to the avalanche property of hash functions, completely different shuffled images will be produced even if there is a tiny difference between the original ones, and it helps accelerate the diffusion process. Experimental results indicate that the proposed scheme requires only one and two cipher cycles to achieve an acceptable and a satisfactory diffusion properties, respectively, whereas two and three cipher cycles are needed by typical schemes to achieve the same properties. Thorough security analysis is carried out, and the results demonstrate the satisfactory security of the proposed scheme.

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“…Unfortunately, the redundant iteration operations downgrade the efficiency of the cryptosystem to some extent. In [16], the value of each keystream element is dynamically altered according to the plain-pixel values during the substitution process.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental results have demonstrated that their scheme takes one round of permutation and two rounds of substitution to obtain a satisfactory diffusion effect. In [16,[21][22][23], chaos-based image ciphers using a bit-level permutation were suggested. Owing to the substitution effect introduced in the permutation stage, the number of iteration rounds required by the time-consuming substitution procedure is reduced, and hence a shorter encryption time is needed.…”

Section: Introductionmentioning

confidence: 99%

A New Chaos-Based Color Image Encryption Scheme with an Efficient Substitution Keystream Generation Strategy

Zhang

Zhu

et al. 2018

Security and Communication Networks

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This paper suggests a new chaos-based color image cipher with an efficient substitution keystream generation strategy. The hyperchaotic Lü system and logistic map are employed to generate the permutation and substitution keystream sequences for image data scrambling and mixing. In the permutation stage, the positions of colored subpixels in the input image are scrambled using a pixel-swapping mechanism, which avoids two main problems encountered when using the discretized version of areapreserving chaotic maps. In the substitution stage, we introduce an efficient keystream generation method that can extract three keystream elements from the current state of the iterative logistic map. Compared with conventional method, the total number of iterations is reduced by 3 times. To ensure the robustness of the proposed scheme against chosen-plaintext attack, the current state of the logistic map is perturbed during each iteration and the disturbance value is determined by plain-pixel values. The mechanism of associating the keystream sequence with plain-image also helps accelerate the diffusion process and increase the degree of randomness of the keystream sequence. Experimental results demonstrate that the proposed scheme has a satisfactory level of security and outperforms the conventional schemes in terms of computational efficiency.

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A Symmetric Chaos-Based Image Cipher with an Improved Bit-Level Permutation Strategy

Cited by 49 publications

References 37 publications

A Novel Image Encryption Scheme Using the Composite Discrete Chaotic System

A Novel Image Encryption Scheme Using the Composite Discrete Chaotic System

A New Chaos-based Image Cipher Using a Hash Function

A New Chaos-Based Color Image Encryption Scheme with an Efficient Substitution Keystream Generation Strategy

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