An Innovative Electro-Optical Chaotic System Using Electrical Mutual Injection With Nonlinear Transmission Function

Huang, Yizhao; Hu, Hanping; Xie, Feilong; Zheng, Jun

doi:10.1109/jphot.2017.2782841

Cited by 17 publications

(8 citation statements)

References 21 publications

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“…It can be seen that the chaotic waveforms of the transmitter and receiver basically coincide. The cross-correlation coefficient (CC) is used to evaluate the chaos synchronization performance, 26 which is defined as CC=⟨[x(t)−⟨x(t)⟩][y(t)−⟨y(t)⟩]⟩⟨[x(t)−⟨x(t)⟩]2⟩⟨[y(t)−⟨y(t)⟩]2⟩,x(t) is the chaotic time series of the transmitter, and y(t) is the chaotic time series of the receiver. When CC is greater than 0.95, it is considered that high-quality chaos synchronization is achieved.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Chaos Synchronization Performance Analysismentioning

confidence: 99%

“…[23][24][25] In Ref. 26, an electro-optical intensity chaotic mutual coupling system that introduced a nonlinear transmission equation into the feedback loop is proposed. The simulation results show that TDSs will not be exposed only when the feedback gain reaches a large value.…”

Section: Introductionmentioning

confidence: 99%

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Electro-optical chaotic communication system based on additional chaotic phase-shift with time-delay signature concealment

Zhu,

Wang,

Zhang

2023

Opt. Eng.

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We propose and demonstrate an electro-optical chaotic communication system with additional chaotic phase-shift based on the mutual coupling structure. Under the condition of complete concealment of time-delayed signatures (TDSs), the key space of the system is greatly enhanced and highly reliable chaotic communication is finally realized. The additional-phase introduced by the new branch is nonlinearly superimposed on the phase generated by the chaotic signal of the original branch, which improves the complexity and aperiodicity of chaos. For security performance, the system only needs a very small feedback gain (i.e., β i ¼ 2.5) to conceal TDSs. Moreover, since the system has only one chaotic signal transmitted in the transmission link, it overcomes the exposure of TDSs caused by the cross-correlation characteristics between different links. At the same time, the system has strong synchronization robustness and can achieve high-quality communication when the parameters are well-matched. To sum up, the proposed system can effectively resist eavesdropping, which provides security for the physical layer of optical networks.

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Chaos Synchronization Performance Analysismentioning

confidence: 99%

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Electro-optical chaotic communication system based on additional chaotic phase-shift with time-delay signature concealment

Zhu,

Wang,

Zhang

2023

Opt. Eng.

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“…Where x t (t) is the chaotic signal at the transmitter and x r (t) is that at the receiver. When the value of CC is larger than 0.95, we considered that the high-quality synchronization is obtained [28].…”

Section: Synchronization Scheme and Chaos Communicationmentioning

confidence: 99%

Security-Enhanced Electro-Optic Feedback Phase Chaotic System Based on Nonlinear Coupling of Two Delayed Interfering Branches

Wang

et al. 2018

IEEE Photonics J.

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In this paper, a novel electro-optic feedback phase chaotic system based on nonlinear coupling of two delayed interfering branches is proposed and analyzed by numerical simulation. The feedback loop of the proposed system contains two delay branches and a Mach-Zehnder modulator. The chaotic voltages generated from two branches are nonlinearly converted in order to reduce their temporal correlations. The dynamic characteristics and the complexity of the generated chaotic signal are evaluated by the bifurcation diagram and permutation entropy, respectively. Besides, the simulated results show that the timedelay signature can be concealed effectively with a lower feedback gain, meanwhile the key space is extended considerably since more tunable parameters are nonlinearly coupled, thus the security can be improved greatly. Furthermore, the communication system based on the proposed scheme is discussed, and the results demonstrate that this system can be applied in secure communication.

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“…[19] Much effort has been made to resolve the above problems and increase the complexity of existing chaotic systems. [20][21][22][23][24][25] For example, in Ref. [20], Liu et al proposed a new coupled electro-optic chaotic system to conceal the time delay and enhance the complexity of chaos.…”

Section: Introductionmentioning

confidence: 99%

Exponential sine chaotification model for enhancing chaos and its hardware implementation

Wang¹,

Li²,

Luo³

2022

Chinese Phys. B

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Chaotic systems have been intensively studied for their roles in many applications like cryptography, secure communications, nonlinear controls, etc. However, the limited complexity of existing chaotic systems weakens chaos-based practical applications. Designing chaotic maps with high complexity is attractive. This paper proposes the exponential sine chaotification model (ESCM), a method of using exponential sine function as a nonlinear transform model, to enhance the complexity of chaotic maps. To verify the performance of the ESCM, we firstly demonstrated it through theoretical analysis. Then, to exhibit the high efficiency and usability of ESCM, we applied ESCM to one-dimensional (1D) and multi-dimensional (MD) chaotic systems. The effects were examined by the Lyapunov exponent and found enhanced chaotic maps have much more complicated dynamics behaviors compared to their originals. To validate the simplicity of ESCM in hardware implementation, we simulate three enhanced chaotic maps using the digital signal processor (DSP). To explore the ESCM in practical application, we applied ESCM to image encryption. Results verified that the ESCM can make previous chaos maps competitive to usage in image encryption.

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An Innovative Electro-Optical Chaotic System Using Electrical Mutual Injection With Nonlinear Transmission Function

Cited by 17 publications

References 21 publications

Electro-optical chaotic communication system based on additional chaotic phase-shift with time-delay signature concealment

Electro-optical chaotic communication system based on additional chaotic phase-shift with time-delay signature concealment

Security-Enhanced Electro-Optic Feedback Phase Chaotic System Based on Nonlinear Coupling of Two Delayed Interfering Branches

Exponential sine chaotification model for enhancing chaos and its hardware implementation

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