An Efficient Image Encryption Using a Dynamic, Nonlinear and Secret Diffusion Scheme

In the era of the Internet, image encryption plays an important role in information security. Chaotic systems and DNA operations have been proven to be powerful for image encryption. To further enhance the security of image, in this paper, we propose a novel algorithm that combines the fractional-order hyperchaotic Lorenz system and DNA computing (FOHCLDNA) for image encryption. Specifically, the algorithm consists of four parts: firstly, we use a fractional-order hyperchaotic Lorenz system to generate a pseudorandom sequence that will be utilized during the whole encryption process; secondly, a simple but effective diffusion scheme is performed to spread the little change in one pixel to all the other pixels; thirdly, the plain image is encoded by DNA rules and corresponding DNA operations are performed; finally, global permutation and 2D and 3D permutation are performed on pixels, bits, and acid bases. The extensive experimental results on eight publicly available testing images demonstrate that the encryption algorithm can achieve state-of-the-art performance in terms of security and robustness when compared with some existing methods, showing that the FOHCLDNA is promising for image encryption.

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A Novel Image Encryption Approach Based on a Hyperchaotic System, Pixel-Level Filtering with Variable Kernels, and DNA-Level Diffusion

Entropy ◽

10.3390/e22010005 ◽

2019 ◽

Vol 22 (1) ◽

pp. 5 ◽

Cited By ~ 11

Author(s):

Jiang Wu ◽

Jiayi Shi ◽

Taiyong Li

Keyword(s):

Image Encryption ◽

Evaluation Criteria ◽

Image Transmission ◽

Hyperchaotic System ◽

Image Security ◽

Novel Approach ◽

Level Data ◽

Diffusion Scheme ◽

Dynamic Filtering ◽

And Storage

With the rapid growth of image transmission and storage, image security has become a hot topic in the community of information security. Image encryption is a direct way to ensure image security. This paper presents a novel approach that uses a hyperchaotic system, Pixel-level Filtering with kernels of variable shapes and parameters, and DNA-level Diffusion, so-called PFDD, for image encryption. The PFDD totally consists of four stages. First, a hyperchaotic system is applied to generating hyperchaotic sequences for the purpose of subsequent operations. Second, dynamic filtering is performed on pixels to change the pixel values. To increase the diversity of filtering, kernels with variable shapes and parameters determined by the hyperchaotic sequences are used. Third, a global bit-level scrambling is conducted to change the values and positions of pixels simultaneously. The bit stream is then encoded into DNA-level data. Finally, a novel DNA-level diffusion scheme is proposed to further change the image values. We tested the proposed PFDD with 15 publicly accessible images with different sizes, and the results demonstrate that the PFDD is capable of achieving state-of-the-art results in terms of the evaluation criteria, indicating that the PFDD is very effective for image encryption.

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Cryptanalysis and Improvement on an Image Encryption Algorithm Design Using a Novel Chaos Based S-Box

Symmetry ◽

10.3390/sym10090399 ◽

2018 ◽

Vol 10 (9) ◽

pp. 399 ◽

Cited By ~ 34

Author(s):

Congxu Zhu ◽

Guojun Wang ◽

Kehui Sun

Keyword(s):

Image Encryption ◽

Algorithm Design ◽

Security Analysis ◽

Feedback Mechanism ◽

Encryption Algorithm ◽

Security Level ◽

Diffusion Scheme ◽

Cryptographic System ◽

Image Cryptosystem ◽

Image Encryption Algorithm

This article performs the cryptanalysis of an image encryption algorithm using an S-box generated by chaos. The algorithm has the advantages of simple structure, high encryption efficiency, and good encryption performance. However, an attentive investigation reveals that it has some undiscovered security flaws. The image cryptosystem is totally breakable under proposed chosen-plaintext attack, and only two chosen plain-images are required. An array equivalent to the S-box is constructed by an elaborately designed chosen-plaintext image, and the cipher-image is deciphered without having to know the S-box itself. Both mathematical deduction and experimental results validate the feasibility of the attacking scheme. Furthermore, an improved encryption scheme is proposed, in which a feedback mechanism is introduced, a bidirectional diffusion scheme is designed, and values of the ciphertext are associated with more parameters in each diffusion process. Testing results and security analysis verify that the improved cryptographic system can achieve a higher security level and has a better performance than some of the latest encryption algorithms.

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Image Encryption Based on Dynamic Filtering and Bit Cuboid Operations

Complexity ◽

10.1155/2019/7485621 ◽

2019 ◽

Vol 2019 ◽

pp. 1-16 ◽

Cited By ~ 15

Author(s):

Xinsheng Li ◽

Zhilong Xie ◽

Jiang Wu ◽

Taiyong Li

Keyword(s):

Image Encryption ◽

State Of The Art ◽

Evaluation Criteria ◽

The Internet ◽

Pseudorandom Sequence ◽

Hyperchaotic System ◽

Diffusion Scheme ◽

Media Types ◽

Dynamic Filtering ◽

Novel Algorithm

As one of the most widely used media types, images play an important role in the era of the Internet. And hence how to enhance the security of images has become a hot topic in the field of information security. However, due to some intrinsic characteristics of images, image security is still a challenging task. For the purpose of coping with this issue, in this paper, we propose a novel algorithm that combines a hyperchaotic system, dynamic filtering, and bit cuboid operations, namely, DFBC, for image encryption. Specifically, the proposed DFBC consists of four steps: firstly, a 7D Lorenz hyperchaotic system is utilized to generate a pseudorandom sequence; secondly, variable 1D filters are derived from the pseudorandom sequence, and dynamic filtering is conducted on each pixel of an image; thirdly, a diffusion scheme is performed and then the image is transformed to a bit cuboid; and, finally, various types of permutation (rearranging, symmetry, rotation, zigzag, and global bit permutation) are performed on the bit cuboid. The experiments on several testing images demonstrate that the DFBC achieves state-of-the-art results in terms of several evaluation criteria, showing that the DFBC is promising for image encryption.

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A Chaos-based Pseudorandom Permutation and Bilateral Diffusion Scheme for Image Encryption

International Journal of Image Graphics and Signal Processing ◽

10.5815/ijigsp.2014.11.07 ◽

2014 ◽

Vol 6 (11) ◽

pp. 50-61 ◽

Cited By ~ 4

Author(s):

Guo Weichuang ◽

◽

Zhao Junqin ◽

Ye Ruisong

Keyword(s):

Image Encryption ◽

Pseudorandom Permutation ◽

Diffusion Scheme

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Implementation Color-Images Cryptography Using RSA Algorithm

International Journal of Advanced Research in Computer Science and Software Engineering ◽

10.23956/ijarcsse.v7i11.500 ◽

2017 ◽

Vol 7 (11) ◽

pp. 181

Author(s):

Ali Saleh Al Najjar

Keyword(s):

Information Security ◽

Image Encryption ◽

Color Images ◽

Public Key ◽

Open Channels ◽

Image Security ◽

Rsa Algorithm ◽

The Media ◽

Encrypted Images ◽

Difficult Issue

Absolute protection is a difficult issue to maintain the confidentiality of images through their transmission over open channels such as internet or networks and is a major concern in the media, so image Cryptography becomes an area of attraction and interest of research in the field of information security. The paper will offer proposed system that provides a special kinds of image Encryption image security, Cryptography using RSA algorithm for encrypted images by HEX function to extract HEX Code and using RSA public key algorithm, to generate cipher image text. This approach provides high security and it will be suitable for secured transmission of images over the networks or Internet.

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