scholarly journals A Novel Image Encryption Algorithm Based on DNA Subsequence Operation

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Qiang Zhang ◽  
Xianglian Xue ◽  
Xiaopeng Wei
Keyword(s):  
Image Encryption ◽  
Chaotic Map ◽  
Security Analysis ◽  
Experimental Results ◽  
Encryption Algorithm ◽  
Secret Key ◽  
Logistic Chaotic Map ◽  
Image Encryption Algorithm

We present a novel image encryption algorithm based on DNA subsequence operation. Different from the traditional DNA encryption methods, our algorithm does not use complex biological operation but just uses the idea of DNA subsequence operations (such as elongation operation, truncation operation, deletion operation, etc.) combining with the logistic chaotic map to scramble the location and the value of pixel points from the image. The experimental results and security analysis show that the proposed algorithm is easy to be implemented, can get good encryption effect, has a wide secret key's space, strong sensitivity to secret key, and has the abilities of resisting exhaustive attack and statistic attack.

A Watermark Preprocessing Algorithm Based on Arnold Transformation and Logistic Chaotic Map

2011 ◽  
Vol 341-342 ◽  
pp. 720-724 ◽  
Author(s):  
Wang Sheng Fang ◽  
Lu Lu Wu ◽  
Rong Zhang
Keyword(s):  
Correlation Analysis ◽  
Image Encryption ◽  
Chaotic Map ◽  
Encryption Algorithm ◽  
Arnold Transform ◽  
Key Space ◽  
Key Sensitivity ◽  
Logistic Chaotic Map ◽  
Arnold Transformation ◽  
Image Encryption Algorithm

One of the main purpose of the watermark preprocessing is to improve the robustness and security. For this reason,this paper presents an image encryption algorithm, which combines position scrambling and gray scrambling scrambled according to Arnold transform.Then all of the pixels of each sub-block are scambled by the algorithm based on Logistic chaotic map.Finally, all of the Pixels are redistributed and scrambled totally.Basing on image location scrambling,it takes advantage of multi-dimensional Arnold transformation and Logistic chaotic map, image gray scrambling is achieved. By histogram analysis,key sensitivity anslysis and correlation analysis of adjacent pixels of the results of the simulation, indicating that the scrambling effect of the algorithm is good,and the key space is large.

scholarly journals Image Encryption Algorithm Based on Chaotic Economic Model

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
S. S. Askar ◽  
A. A. Karawia ◽  
Ahmad Alshamrani
Keyword(s):  
Image Encryption ◽  
Chaotic Map ◽  
Security Analysis ◽  
Correlation Coefficients ◽  
Encryption Algorithm ◽  
Economic Systems ◽  
Plain Image ◽  
Encrypted Images ◽  
Image Encryption Algorithm ◽  
Gray Values

In literature, chaotic economic systems have got much attention because of their complex dynamic behaviors such as bifurcation and chaos. Recently, a few researches on the usage of these systems in cryptographic algorithms have been conducted. In this paper, a new image encryption algorithm based on a chaotic economic map is proposed. An implementation of the proposed algorithm on a plain image based on the chaotic map is performed. The obtained results show that the proposed algorithm can successfully encrypt and decrypt the images with the same security keys. The security analysis is encouraging and shows that the encrypted images have good information entropy and very low correlation coefficients and the distribution of the gray values of the encrypted image has random-like behavior.

Image Encryption Algorithm Based on Even Scrambling

2011 ◽  
Vol 179-180 ◽  
pp. 470-474
Author(s):  
Jian Zhang ◽  
Hong E Ren ◽  
Yu Chen
Keyword(s):  
Image Encryption ◽  
Chaotic Map ◽  
Experimental Results ◽  
Universal Property ◽  
Encryption Algorithm ◽  
Image Scrambling ◽  
Important Method ◽  
Image Position ◽  
Image Encryption Algorithm

Image scrambling is an important method to achieve images secrecy. Arnold cat transformation is widely applied, and its scrambling effect is better relatively in the classical scrambling algorithms. But it has some shortcomings of short key qualities and poor universal property. It brings forward an algorithm of image position even scrambling through improving the Arnold cat transformation. On the basis of position scrambling, the image pixel values are scrambled using chaotic map. Experimental results show that the algorithm has many advantages of increasing key qualities obviously, satisfactory effect of scrambling, and the pixel values of the image are both changed.

scholarly journals Image Encryption Algorithm Based on DNA Encoding and Chaotic Maps

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Jian Zhang ◽  
DongXin Fang ◽  
Honge Ren
Keyword(s):  
Image Encryption ◽  
Dna Sequences ◽  
Random Number ◽  
Chaotic Maps ◽  
Chaotic Map ◽  
Security Analysis ◽  
Encryption Algorithm ◽  
Dna Encoding ◽  
Before And After ◽  
Image Encryption Algorithm

We propose a new image encryption algorithm based on DNA sequences combined with chaotic maps. This algorithm has two innovations: (1) it diffuses the pixels by transforming the nucleotides into corresponding base pairs a random number of times and (2) it confuses the pixels by a chaotic index based on a chaotic map. For any size of the original grayscale image, the rows and columns are fist exchanged by the arrays generated by a logistic chaotic map. Secondly, each pixel that has been confused is encoded into four nucleotides according to the DNA coding. Thirdly, each nucleotide is transformed into the corresponding base pair a random number of time(s) by a series of iterative computations based on Chebyshev’s chaotic map. Experimental results indicate that the key account of this algorithm is 1.536 × 10127, the correlation coefficient of a 256 × 256 Lena image between, before, and after the encryption processes was 0.0028, and the information entropy of the encrypted image was 7.9854. These simulation results and security analysis show that the proposed algorithm not only has good encryption effect, but also has the ability to repel exhaustive, statistical, differential, and noise attacks.

scholarly journals An Image Encryption Algorithm Based on Balanced Pixel and Chaotic Map

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Jian Zhang ◽  
Yutong Zhang
Keyword(s):  
Information Security ◽  
Image Encryption ◽  
Chaotic Map ◽  
Security Analysis ◽  
Encryption Algorithm ◽  
Simulation Experiments ◽  
Encryption Algorithms ◽  
The Times ◽  
Human Eyes ◽  
Image Encryption Algorithm

Image encryption technology has been applied in many fields and is becoming the main way of protecting the image information security. There are also many ways of image encryption. However, the existing encryption algorithms, in order to obtain a better effect of encryption, always need encrypting several times. There is not an effective method to decide the number of encryption times, generally determined by the human eyes. The paper proposes an image encryption algorithm based on chaos and simultaneously proposes a balanced pixel algorithm to determine the times of image encryption. Many simulation experiments have been done including encryption effect and security analysis. Experimental results show that the proposed method is feasible and effective.

scholarly journals An Improved Piecewise Linear Chaotic Map Based Image Encryption Algorithm

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Yuping Hu ◽  
Congxu Zhu ◽  
Zhijian Wang
Keyword(s):  
Image Encryption ◽  
Piecewise Linear ◽  
Chaotic Map ◽  
Security Analysis ◽  
Encryption Algorithm ◽  
Pseudorandom Sequences ◽  
Piecewise Linear Chaotic Map ◽  
Key Space ◽  
Plain Image ◽  
Image Encryption Algorithm

An image encryption algorithm based on improved piecewise linear chaotic map (MPWLCM) model was proposed. The algorithm uses the MPWLCM to permute and diffuse plain image simultaneously. Due to the sensitivity to initial key values, system parameters, and ergodicity in chaotic system, two pseudorandom sequences are designed and used in the processes of permutation and diffusion. The order of processing pixels is not in accordance with the index of pixels, but it is from beginning or end alternately. The cipher feedback was introduced in diffusion process. Test results and security analysis show that not only the scheme can achieve good encryption results but also its key space is large enough to resist against brute attack.

scholarly journals A Tweakable Image Encryption Algorithm Using an Improved Logistic Chaotic Map

2019 ◽  
Vol 36 (5) ◽  
pp. 407-417
Author(s):  
Djamel Herbadji ◽  
Nadir Derouiche ◽  
Aissa Belmeguenai ◽  
Abderrahmane Herbadji ◽  
Selma Boumerdassi
Keyword(s):  
Image Encryption ◽  
Chaotic Map ◽  
Encryption Algorithm ◽  
Logistic Chaotic Map ◽  
Image Encryption Algorithm

scholarly journals BREAKING AN IMAGE ENCRYPTION ALGORITHM BASED ON CHAOS

2011 ◽  
Vol 21 (07) ◽  
pp. 2067-2076 ◽  
Author(s):  
CHENGQING LI ◽  
MICHAEL Z. Q. CHEN ◽  
KWOK-TUNG LO
Keyword(s):  
Image Encryption ◽  
Experimental Results ◽  
Encryption Algorithm ◽  
Secret Key ◽  
Differential Attack ◽  
Plain Image ◽  
Image Encryption Algorithm

Recently, a chaos-based image encryption algorithm called MCKBA (Modified Chaotic-Key Based Algorithm) was proposed. This paper analyzes the security of MCKBA and finds that it can be broken with a differential attack, which requires only four chosen plain-images. Performance of the attack is verified by experimental results. In addition, some defects of MCKBA, including insensitivity with respect to changes of plain-image/secret key, are reported.

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