An Effective Chaos-Based Image Encryption Scheme Using Imitating Jigsaw Method

In this paper, an efficient chaos-based image encryption scheme is proposed, which uses the imitating jigsaw method containing revolving and shifting operations. In this scheme, there are three processes in encryption: preprocessing, encryption process, and postprocessing. In the preprocessing, the original image is partitioned into 64 × 64 pixel image blocks and then randomly revolved and shifted under control sequences which are generated by the hyperchaotic Lorenz system whose initial conditions are calculated by original image and keys. Therefore, the preprocessing is sensitive to plain image against differential attacks. In the encryption process, the after-preprocessing image is partitioned into 32 × 32 pixel image blocks; next they are randomly revolved and encrypted by control sequence and key blocks which are generated by the skew tent map. In postprocessing, the after-encryption image is partitioned into 16 × 16 pixels’ image blocks, and they are randomly revolved and shifted again under control sequences which are related with encrypted image and keys. The postprocessing further increases the diffusion characteristics. Moreover, the test experiment and security analyses are given; the results show that our proposed cryptosystem has both security and speed performance.

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A Wheel-Switch Selective Image Encryption Scheme Using Spatiotemporal Chaotic System

Zeitschrift für Naturforschung A ◽

10.5560/zna.2013-0075 ◽

2014 ◽

Vol 69 (1-2) ◽

pp. 61-69 ◽

Cited By ~ 2

Author(s):

Xing-Yuan Wang ◽

Xue-Mei Bao

Keyword(s):

Theoretical Analysis ◽

Image Encryption ◽

Chaotic System ◽

Initial Conditions ◽

Image Data ◽

Encryption Scheme ◽

Cyclic Shift ◽

Coupling Constant ◽

Plain Image ◽

Spatiotemporal Chaotic System

In this paper, we propose a novel selective image encryption scheme using a one-way coupled map lattice (CML) consisting of logistic maps and a selector constructed by two variants of a cyclic shift register (VCSR). The initial conditions and the coupling constant of CML in our scheme are influenced by all the contents of the plain image. Moreover, the selector is closely related to the nonencrypted part of the plain image. In addition, we select only a portion of image data to encrypt via a wheel-switch scheme governed by the selector. Users can select an appropriate proportion to encrypt the plain image for their different demands of security and efficiency. Experimental results and theoretical analysis show that the cryptosystem is effective and can resist various typical attacks.

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Splicing Model and Hyper–Chaotic System for Image Encryption

Journal of Electrical Engineering ◽

10.1515/jee-2016-0012 ◽

2016 ◽

Vol 67 (2) ◽

pp. 78-86 ◽

Cited By ~ 7

Author(s):

Hongye Niu ◽

Changjun Zhou ◽

Bin Wang ◽

Xuedong Zheng ◽

Shihua Zhou

Keyword(s):

Image Encryption ◽

Chaotic System ◽

Dna Computing ◽

Formal Model ◽

Security Analysis ◽

The Internet ◽

Encryption Scheme ◽

Image Information ◽

Plain Image ◽

Differential Attacks

Abstract Encryption is an effective way to protect the image information from attacking by intruders in the transmission applications through the Internet. This study presents an image encryption scheme on the basics of the formal model of DNA computing-splicing system and hyper-chaotic system, which utilizes the instinct properties of hyper-chaotic system and splicing model while programming the method. In our proposed algorithm, the quaternary coding is used to split the plain image into four sub-sections so that we can’t get the cipher image without any one sub-section. This new method can be used to change the plain image information drastically. The experimental results and security analysis show that our method not only has a good security but also increases the resistance to common attacks such as exhaustive attacks, statistical attacks and differential attacks.

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A Color Image Encryption Scheme Based on a Hybrid Cascaded Chaotic System

International Journal of Bifurcation and Chaos ◽

10.1142/s021812742150125x ◽

2021 ◽

Vol 31 (09) ◽

pp. 2150125

Author(s):

Shanshan Cheng ◽

Jingru Sun ◽

Cong Xu

Keyword(s):

Image Encryption ◽

Chaotic System ◽

Color Image ◽

Initial Conditions ◽

Encryption Scheme ◽

Color Image Encryption ◽

Chaotic Sequences ◽

Key Space ◽

Plain Image ◽

Sensitivity To Initial Conditions

As image is an important way of information representation, researchers pay more and more attention on image encryption. In order to improve the performance of image encryption, a novel image encryption scheme based on a hybrid cascaded chaotic system and sectoral segmentation is proposed in this paper. Hybrid cascaded chaotic system has a larger key space, higher complexity, more sensitivity to initial conditions. Four chaotic sequences relevant to a plain image are generated by this system, which strengthen plaintext correlation and the randomness. During the scrambling process, sectoral segmentation focuses on how to extract a sequence from the disk storing data, which can not only reduce the correlation between the three components of the image, but also hide image information to a large extent. Further, a DNA algorithm is used in the diffusion process. Simulation shows that the proposed scheme can effectively resist various attacks and improve the encryption performance.

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An Efficient Method of Image Encryption Using Rossler Chaotic System

Academic Journal of Nawroz University ◽

10.25007/ajnu.v10n2a916 ◽

2021 ◽

Vol 10 (2) ◽

pp. 11

Author(s):

Yasir Ahmed Hamza ◽

Marwan Dahar Omer

Keyword(s):

Image Encryption ◽

Chaotic System ◽

Initial Conditions ◽

Computation Time ◽

Encryption Algorithm ◽

Brute Force ◽

Symmetric Encryption ◽

New Approach ◽

System Parameters ◽

Plain Image

In this study, a new approach of image encryption has been proposed. This method is depends on the symmetric encryption algorithm RC4 and Rossler chaotic system. Firstly, the encryption key is employed to ciphering a plain image using RC4 and obtains a ciphered-image. Then, the same key is used to generate the initial conditions of the Rossler system. The system parameters and the initial conditions are used as the inputs for Rossler chaotic system to generate the 2-dimensional array of random values. The resulted array is XORed with the ciphered-image to obtain the final encrypted-image. Based on the experimental results, the proposed method has achieved high security and less computation time. Also, the proposed method can be resisted attacks like (statistical, brute-force, and differential).

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Cryptanalysis of a New Chaotic Image Encryption Technique Based on Multiple Discrete Dynamical Maps

Entropy ◽

10.3390/e23121581 ◽

2021 ◽

Vol 23 (12) ◽

pp. 1581

Author(s):

Haiju Fan ◽

Chenjiu Zhang ◽

Heng Lu ◽

Ming Li ◽

Yanfang Liu

Keyword(s):

Image Encryption ◽

Strong Correlation ◽

Digital Images ◽

Computational Cost ◽

Encryption Scheme ◽

Discrete Dynamic ◽

Diffusion Structure ◽

Plain Image ◽

Simulation Results ◽

Chaotic Image Encryption

Recently, a new chaotic image encryption technique was proposed based on multiple discrete dynamic maps. The authors claim that the scheme can provide excellent privacy for traditional digital images. However, in order to minimize the computational cost, the encryption scheme adopts one-round encryption and a traditional permutation–diffusion structure. Through cryptanalysis, there is no strong correlation between the key and the plain image, which leads to the collapse of cryptosystem. Based on this, two methods of chosen-plaintext attacks are proposed in this paper. The two methods require 3 pairs and 258 pairs of plain and cipher images, respectively, to break the original encryption system. The simulation results show the effectiveness of the two schemes.

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Quantum Image Encryption Scheme Using Arnold Transform and S-box Scrambling

Entropy ◽

10.3390/e21040343 ◽

2019 ◽

Vol 21 (4) ◽

pp. 343 ◽

Cited By ~ 9

Author(s):

Hui Liu ◽

Bo Zhao ◽

Linquan Huang

Keyword(s):

Image Encryption ◽

Quantum Chaos ◽

Initial Conditions ◽

Chaotic Map ◽

Gray Level ◽

Encryption Scheme ◽

Arnold Transform ◽

Quantum Image ◽

Quantum Image Encryption ◽

Mutation Operation

The paper proposes a lossless quantum image encryption scheme based on substitution tables (S-box) scrambling, mutation operation and general Arnold transform with keys. First, the key generator builds upon the foundation of SHA-256 hash with plain-image and a random sequence. Its output value is used to yield initial conditions and parameters of the proposed image encryption scheme. Second, the permutation and gray-level encryption architecture is built by discrete Arnold map and quantum chaotic map. Before the permutation of Arnold transform, the pixel value is modified by quantum chaos sequence. In order to get high scrambling and randomness, S-box and mutation operation are exploited in gray-level encryption stage. The combination of linear transformation and nonlinear transformation ensures the complexity of the proposed scheme and avoids harmful periodicity. The simulation shows the cipher-image has a fairly uniform histogram, low correlation coefficients closed to 0, high information entropy closed to 8. The proposed cryptosystem provides 2256 key space and performs fast computational efficiency (speed = 11.920875 Mbit/s). Theoretical analyses and experimental results prove that the proposed scheme has strong resistance to various existing attacks and high level of security.

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A Fast Encryption Scheme Suitable for Video Surveillance Applications Using SHA-256 Hash Function and 1D Sine–Sine Chaotic Map

International Journal of Image and Graphics ◽

10.1142/s0219467821500224 ◽

2020 ◽

pp. 2150022

Author(s):

Kirtee Panwar ◽

Ravindra Kumar Purwar ◽

Garima Srivastava

Keyword(s):

Video Surveillance ◽

Image Encryption ◽

Chaotic Map ◽

Encryption Scheme ◽

Internal Working ◽

Key Space ◽

Higher Dimensional ◽

Secret Keys ◽

Plain Image ◽

Surveillance Applications

This paper proposes an image encryption technique which is fast and secure. The encryption scheme is designed for secure transmission of video surveillance data (keyframes) over insecure network. The image encryption technique employs 1D Sine–Sine system with better chaotic properties than its seed map and faster than higher-dimensional chaotic systems. Further, design of encryption scheme is based on two permutation rounds, which employs pixel swapping operation and diffusion operation which is simple and provides required security against plaintext, differential and various other attacks. Three separate chaotic sequences are generated using 1D Sine–Sine system which enhances the key space of the encryption scheme. Secret keys are updated dynamically with SHA-256 hash value obtained from plain image. Hash values of plain image are efficiently used without loss of any hash value information. This makes the encryption scheme plaintext sensitive and secure against plaintext attacks. Performance and security aspects of encryption scheme is analyzed both quantitatively using predefined security metrics and qualitatively by scrutinizing the internal working of encryption scheme. Computational complexity of encrypting a plain image of size [Formula: see text] is [Formula: see text] and is suitable for encrypting keyframes of video for secure surveillance applications.

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