A privacy encryption algorithm based on an improved chaotic system

Wang, Xingyuan; Wang, Yu; Unar, Salahuddin; Wang, Mingxu; Wang, Shibing

doi:10.1016/j.optlaseng.2019.06.015

Cited by 16 publications

(7 citation statements)

References 33 publications

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“…Image-encryption algorithms should be highly sensitive to keys [21]. To ensure security, even if the key used is only slightly different from the correct key, it should have a completely different encryption and decryption result.…”

Section: Key Sensitivity Analysismentioning

confidence: 99%

An Image-Encryption Algorithm Based on Stage-Merging Bit Scrambling

2022

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At present, the existing single-pixel position-scrambling technique is not sensitive to the chaotic sequence used, and adjacent-pixel position scrambling has difficulty ensuring a good scrambling effect and speed at the same time. In this paper, a stage-merging scrambling algorithm is proposed, which combines the two-stage scrambling process and can complete the dual scrambling of pixel position and pixel value at the same time. It not only improves the scrambling speed, but also greatly improves the scrambling effects. Then, a complete image encryption and decryption scheme was designed based on stage-merging bit scrambling combined with DNA coding. Security analysis shows that the algorithm can resist various means of attack such as exhaustive attack and differential attack. The research in this paper extends the existing bit-scrambling algorithms and is suitable for practical applications.

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Section: Key Sensitivity Analysismentioning

confidence: 99%

An Image-Encryption Algorithm Based on Stage-Merging Bit Scrambling

2022

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“…A feasible encryption algorithm needs the ability of anti-interference, and robustness is an important indicator 2 , 7 , 26 , 44 . We add Salt-and-Pepper noise with different intensities to the ciphertext images, and we also make different degrees of data loss to the ciphertext image at different locations.…”

Section: Performance Analysesmentioning

confidence: 99%

“…At the same time, MATLAB 2018 (a) is used to plot some graphs. The average running speed of encryption is 0.925 s and the encryption time of other encryption schemes 7 , 14 , 25 , 33 is 2.44 s, 2.135 s, 1.067064 s and 0.9665 s, respectively. The comparison results show that our algorithm is more efficient and suitable for real-time applications.…”

Section: Performance Analysesmentioning

confidence: 99%

A new image encryption algorithm based on the OF-LSTMS and chaotic sequences

Zhang

et al. 2021

Sci Rep

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In this paper, a novel image encryption algorithm based on the Once Forward Long Short Term Memory Structure (OF-LSTMS) and the Two-Dimensional Coupled Map Lattice (2DCML) fractional-order chaotic system is proposed. The original image is divided into several image blocks, each of which is input into the OF-LSTMS as a pixel sub-sequence. According to the chaotic sequences generated by the 2DCML fractional-order chaotic system, the parameters of the input gate, output gate and memory unit of the OF-LSTMS are initialized, and the pixel positions are changed at the same time of changing the pixel values, achieving the synchronization of permutation and diffusion operations, which greatly improves the efficiency of image encryption and reduces the time consumption. In addition the 2DCML fractional-order chaotic system has better chaotic ergodicity and the values of chaotic sequences are larger than the traditional chaotic system. Therefore, it is very suitable to image encryption. Many simulation results show that the proposed scheme has higher security and efficiency comparing with previous schemes.

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“…In [6], this article proposes an encryption system based on an improved system of chaos that hides key information. The first thing to do is improve the chaotic CML diagram, and join the chaotic state from zero.…”

Section: Related Workmentioning

confidence: 99%

Design and Analysis of a Novel Six-Dimensional Hyper Chaotic System

Mehdi

Mohammed

2020

MJS

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The chaotic system has been widely studied. A new six-dimension hyper chaotic system is introduced in this paper. We used a new chaotic system based on a six-dimension for the purpose of increasing chaos in the system, where the new system has eleven positive parameters, complicated chaotic dynamics behaviors and gives an analysis of the new systems. The basic characteristics and dynamic behavior of this system are investigated with a presence of chaotic attractor, Dissipativity, symmetry, equilibrium points, Lyapunov Exponents, Kaplan-Yorke dimension, waveform analysis and sensitivity toward initial conditions. The results of the analysis exhibit that the new system contains three unstable equilibrium points and the six Lyapunov exponents. Maxim non-negative Lyapunov Exponent (MLE) is obtained as 4.72625, and Kaplan-Yorke are obtained as 3.92566, and the new system characteristics with, unstable, high complexity, and unpredictability, the new system dynamics is simulated utilizing MATHEMATICA program. The phase portraits and the qualitative properties of the new hyper chaotic system have been described at the detail.

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A privacy encryption algorithm based on an improved chaotic system

Cited by 16 publications

References 33 publications

An Image-Encryption Algorithm Based on Stage-Merging Bit Scrambling

An Image-Encryption Algorithm Based on Stage-Merging Bit Scrambling

A new image encryption algorithm based on the OF-LSTMS and chaotic sequences

Design and Analysis of a Novel Six-Dimensional Hyper Chaotic System

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