Improving the Security of Pseudo-random Sequence Generator Based on Chen Chaotic System

2015 ◽  
Vol 12 (2) ◽  
pp. 515-523
Author(s):  
Peiyue Li
Keyword(s):  
Chaotic System ◽  
Random Sequence ◽  
Sequence Generator

scholarly journals Coexisting Attractors and Multistability in a Simple Memristive Wien-Bridge Chaotic Circuit

Entropy ◽  
2019 ◽  
Vol 21 (7) ◽  
pp. 678 ◽  
Author(s):  
Yixuan Song ◽  
Fang Yuan ◽  
Yuxia Li
Keyword(s):  
Chaotic System ◽  
Analog Circuit ◽  
Random Sequence ◽  
Mathematical Expression ◽  
Digital Signal ◽  
Approximate Entropy ◽  
Chaotic Circuit ◽  
Coexisting Attractors ◽  
Key Space ◽  
Sequence Generator

In this paper, a new voltage-controlled memristor is presented. The mathematical expression of this memristor has an absolute value term, so it is called an absolute voltage-controlled memristor. The proposed memristor is locally active, which is proved by its DC V–I (Voltage–Current) plot. A simple three-order Wien-bridge chaotic circuit without inductor is constructed on the basis of the presented memristor. The dynamical behaviors of the simple chaotic system are analyzed in this paper. The main properties of this system are coexisting attractors and multistability. Furthermore, an analog circuit of this chaotic system is realized by the Multisim software. The multistability of the proposed system can enlarge the key space in encryption, which makes the encryption effect better. Therefore, the proposed chaotic system can be used as a pseudo-random sequence generator to provide key sequences for digital encryption systems. Thus, the chaotic system is discretized and implemented by Digital Signal Processing (DSP) technology. The National Institute of Standards and Technology (NIST) test and Approximate Entropy analysis of the proposed chaotic system are conducted in this paper.

scholarly journals Analysis of the Time Series Generated by a New High-Dimensional Discrete Chaotic System

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Chuanfu Wang ◽  
Chunlei Fan ◽  
Kai Feng ◽  
Xin Huang ◽  
Qun Ding
Keyword(s):  
Chaotic System ◽  
Chaotic Behavior ◽  
Random Sequence ◽  
High Dimensional ◽  
Suitable Candidate ◽  
Output Sequence ◽  
Short Period ◽  
Large Period ◽  
Low Dimensional ◽  
Sequence Generator

The chaotic behavior of low-dimensional digital chaotic systems is seriously degraded, and the output sequence has a short period. In this study, a digital sequence generator based on a high-dimensional chaotic system is proposed to ensure performance and security. The proposed generator has low resource consumption, and the digital pseudo-random output sequence has a large period. To avoid the nonchaotic state, the multistability in the high-dimensional discrete chaotic system is analyzed. The statistical performance of the output sequence of the proposed digital high-dimensional chaotic system is evaluated, and the results demonstrate that it is a suitable candidate for a long-period pseudo-random sequence generator.

Quantum image encryption based on Lorenz hyper-chaotic system

2020 ◽  
Vol 18 (05) ◽  
pp. 2050022
Author(s):  
Ri-Gui Zhou ◽  
Ying-Bin Li
Keyword(s):  
Image Encryption ◽  
Chaotic System ◽  
Random Sequence ◽  
Good Effect ◽  
Location Information ◽  
Color Information ◽  
Position Information ◽  
Quantum Image ◽  
Quantum Image Encryption ◽  
Index Sequence

According to the higher security of higher-dimensional chaotic system, a new scheme of quantum image encryption and decryption based on Lorenz hyper-chaotic system is proposed. The encryption process is mainly divided into two parts: the location information scrambling process and the color information replacement process. In the location information scrambling process, the pseudo-random sequence obtained by the Lorenz hyper-chaotic system is first sorted to obtain the corresponding position index sequence, and then the rows and columns of the position information are scrambled by the index sequence. In the process of color replacement, the change of pixel value is firstly diffused to each pixel through chaotic sequence, and then the information of each pixel is confused, so as to realize the process of color information replacement. Experimental analysis shows that the encryption scheme in this paper has a good effect.

scholarly journals A self-perturbed pseudo-random sequence generator based on hyperchaos

2019 ◽  
Vol 4 ◽  
pp. 100023 ◽  
Author(s):  
Yi Zhao ◽  
Changyuan Gao ◽  
Jie Liu ◽  
Shaozeng Dong
Keyword(s):  
Random Sequence ◽  
Sequence Generator

HEVC Video Encryption Algorithm Based on Integer Dynamic Coupling Tent Mapping

2020 ◽  
Vol 24 (3) ◽  
pp. 335-345 ◽  
Author(s):  
Bo Liu ◽  
Jiandong Liu ◽  
Shuhong Wang ◽  
Ming Zhong ◽  
Bo Li ◽  
...  
Keyword(s):  
High Efficiency ◽  
Random Sequence ◽  
Encryption Algorithm ◽  
Video Encryption ◽  
Dynamic Coupling ◽  
High Efficiency Video Coding ◽  
Sequence Generation ◽  
Binary Arithmetic ◽  
Key Space ◽  
Sequence Generator

A selective encryption algorithm is proposed to improve the efficiency of high efficiency video coding (HEVC) video encryption and ensure the security of HEVC videos. The algorithm adopts the integer dynamic coupling tent mapping optimization model as the pseudo-random sequence generator, and multi-core parallelization is used as the sequence generation mechanism. The binstrings during the process of context adaptive binary arithmetic coding are selected for encryption, which conforms to the features of invariable binstream and compatible format in terms of video encryption. Performance tests for six types of standard videos with different resolutions were performed. The results indicated that the encryption algorithm has a large key space and benefits from a high encryption effect.

Analysis of Image Encryption Algorithm Based on Chaotic Signal

2013 ◽  
Vol 756-759 ◽  
pp. 2024-2029
Author(s):  
Yu Chi Zhao ◽  
Jing Liu
Keyword(s):  
Image Encryption ◽  
Chaotic Dynamics ◽  
Random Sequence ◽  
Experimental System ◽  
Chaotic Signal ◽  
Encryption Algorithm ◽  
Dynamics Model ◽  
Computer Simulation Experiment ◽  
Sequence Generator ◽  
Image Encryption Algorithm

This paper, based on the characteristics of the chaotic dynamics system, by analyzing the characteristics of many chaotic dynamics model in image encryption and screening studies such as comparison (computer simulation experiment), combined with some specific practices of modern encryption system, regards the chaotic signal as the carrier hiding image information, for the purpose of image encryption. It regards chaotic system as a pseudo-random sequence generator, uses the way of compounding multiple chaos, combined with image replacement technology, designs image encryption algorithm of practical value and completes the development of the experimental system of image encryption

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