scholarly journals Key space enhancement of optical chaos secure communication: chirped FBG feedback semiconductor laser

2019 ◽  
Vol 27 (3) ◽  
pp. 3065 ◽  
Author(s):  
D. M. Wang ◽  
L. S. Wang ◽  
Y. Y. Guo ◽  
Y. C. Wang ◽  
A. B. Wang
Keyword(s):  
Semiconductor Laser ◽  
Secure Communication ◽  
Optical Chaos ◽  
Key Space

scholarly journals Circuit Implementation, Synchronization of Multistability, and Image Encryption of a Four-Wing Memristive Chaotic System

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Guangya Peng ◽  
Fuhong Min ◽  
Enrong Wang
Keyword(s):  
Image Encryption ◽  
Chaotic System ◽  
Secure Communication ◽  
Secret Key ◽  
Multiple Attractors ◽  
Dynamical Behaviors ◽  
Key Space ◽  
Control Scheme ◽  
Memristive System ◽  
Coexistence Of Multiple Attractors

The four-wing memristive chaotic system used in synchronization is applied to secure communication which can increase the difficulty of deciphering effectively and enhance the security of information. In this paper, a novel four-wing memristive chaotic system with an active cubic flux-controlled memristor is proposed based on a Lorenz-like circuit. Dynamical behaviors of the memristive system are illustrated in terms of Lyapunov exponents, bifurcation diagrams, coexistence Poincaré maps, coexistence phase diagrams, and attraction basins. Besides, the modular equivalent circuit of four-wing memristive system is designed and the corresponding results are observed to verify its accuracy and rationality. A nonlinear synchronization controller with exponential function is devised to realize synchronization of the coexistence of multiple attractors, and the synchronization control scheme is applied to image encryption to improve secret key space. More interestingly, considering different influence of multistability on encryption, the appropriate key is achieved to enhance the antideciphering ability.

scholarly journals A new secure image encryption algorithm based on a 5D hyperchaotic map

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0242110
Author(s):  
Dejian Fang ◽  
Shuliang Sun
Keyword(s):  
Image Encryption ◽  
Secure Communication ◽  
Dimensional System ◽  
Hyperchaotic System ◽  
Key Space ◽  
Number Sequences ◽  
Low Dimensional ◽  
Encryption Method ◽  
Differential Attacks ◽  
Image Encryption Algorithm

Image encryption is an effective method for protecting private images during communication. In this paper, a novel image encryption method is proposed based on a 5D hyperchaotic system. Since a 5D hyperchaotic system can generate more complex dynamic behavior than a low-dimensional system, it is used in this paper to generate pseudorandom number sequences. The generated sequences are processed to obtain new sequences. The randomness of the new sequences is improved by recombination and rearrangement. The experimental results and theoretical analysis show that the method possesses a large key space and can resist differential attacks, statistical analysis, entropy analysis, clipping attacks and noise attacks. Therefore, it is very secure and can be used for secure communication.

Research progresses of optical chaos in semiconductor laser systems

2021 ◽  
Vol 0 (0) ◽  
pp. 1-12
Author(s):  
KUANG Shang-qi ◽  
◽  
◽  
GUO Xiang-shuai ◽  
FENG Yu-ling ◽  
...  
Keyword(s):  
Semiconductor Laser ◽  
Optical Chaos ◽  
Laser Systems

Optimization Analysis on Complex Degree of Optical Chaos in a Semiconductor Laser with Double Optical Feedback

2012 ◽  
Vol 39 (12) ◽  
pp. 1202003
Author(s):  
蒋龙 Jiang Long ◽  
夏光琼 Xia Guangqiong ◽  
吴加贵 Wu Jiagui ◽  
肖平 Xiao Ping ◽  
吴正茂 Wu Zhengmao
Keyword(s):  
Semiconductor Laser ◽  
Optical Feedback ◽  
Optimization Analysis ◽  
Optical Chaos

scholarly journals Generalized multi-channel scheme for secure image encryption

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Romil Audhkhasi ◽  
Michelle L. Povinelli
Keyword(s):  
Image Encryption ◽  
Secure Communication ◽  
Communication Systems ◽  
Image Data ◽  
Image Encoding ◽  
Key Space ◽  
Double Exponential ◽  
Multi Wavelength ◽  
Plain Image ◽  
Traditional Image

AbstractThe ability of metamaterials to manipulate optical waves in both the spatial and spectral domains has provided new opportunities for image encoding. Combined with the recent advances in hyperspectral imaging, this suggests exciting new possibilities for the development of secure communication systems. While traditional image encryption approaches perform a 1-to-1 transformation on a plain image to form a cipher image, we propose a 1-to-n transformation scheme. Plain image data is dispersed across n seemingly random cipher images, each transmitted on a separate spectral channel. We show that the size of our key space increases as a double exponential with the number of channels used, ensuring security against both brute-force attacks and more sophisticated attacks based on statistical sampling. Moreover, our multichannel scheme can be cascaded with a traditional 1-to-1 transformation scheme, effectively squaring the size of the key space. Our results suggest exciting new possibilities for secure transmission in multi-wavelength imaging channels.

Research progress of optical chaos in semiconductor laser systems

2021 ◽  
Vol 14 (5) ◽  
pp. 1-13
Author(s):  
KUANG Shang-qi ◽  
◽  
◽  
GUO Xiang-shuai ◽  
FENG Yu-ling ◽  
...  
Keyword(s):  
Semiconductor Laser ◽  
Research Progress ◽  
Optical Chaos ◽  
Laser Systems
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