A Combined Chaotic System for Speech Encryption

Mokhnache, S.; Daâchi, M. E.; Bekkouche, Tewfik; Diffellah, Nacira

doi:10.48084/etasr.4912

Cited by 11 publications

(8 citation statements)

References 18 publications

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“…However, the generation of long chaotic signals with chaotic maps can lead to undesirable outcomes, including increased computational costs in terms of memory and execution time. Previous studies [12][13][14][15] have explored cryptography systems employing scrambling techniques to encrypt data, often permuting data elements based on the arrangement of chaotic signals. While effective for signals of limited length, generating long chaotic signals may result in sequences with duplicated values, thereby constraining scrambling possibilities.…”

Section: Related Workmentioning

confidence: 99%

“…In the pursuit of enhanced security, recent research [15] has proposed encryption strategies for speech signals, involving fragmentation of input speech and permutation based on chaotic generators such as the Logistic map, Tent map, Quadratic map, Bernoulli's map, and the Chen map. Another approach [12] combines classical maps, namely the Logistic map and Cubic map, to encrypt speech signals, producing a chaotic vector for permutation and subsequent diffusion using XOR operation.…”

Section: Related Workmentioning

confidence: 99%

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Enhancing Speech Privacy through Dynamic Chaos- Driven Scrambling with Nested Segmentation

MERRAD,

NOURI

2024

Preprint

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Designing speech cryptosystems presents huge challenges. This paper introduces a novel speech scrambling approach that leverages the strength of two chaotic maps and nested segments. Initially, the process of the scrambling determines the starting point of each segment after diverse parameters are provided, such as the starting point of the first piece and the length of each segment. Then, based on a rearranged chaotic signal generated by the Tent map, the process commences permuting the samples of the nested segments with a specific order that determined according to another rearranged chaotic signal created using the Logistic map. In order to allow the possibility of permuting the samples beyond their initial segment, the process of scrambling iterates throughout the whole signal several times, using a supplied key. The achieved outcomes shows the efficiency of the planned method, as SNR values can reach − 3 and infinity in scrambling and unscrambling operations, respectively, as well, the waveforms vividly depict the flawless diffusion of the samples across the length of the signal.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Enhancing Speech Privacy through Dynamic Chaos- Driven Scrambling with Nested Segmentation

MERRAD,

NOURI

2024

Preprint

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“…Spectrogram points to a visual image of the spectrum for audio signal frequency when it changes with time [12]. Figure 3…”

Section: Spectrogram Analysismentioning

confidence: 99%

“…After that, shuffling/diffusion architecture is carried out to realize the encrypting operation. Modified chaotic map is designed in [12] by merging two classical chaotic maps. The random sequence produced by the new map is used to perform the confusion-diffusion encryption structure upon the input speech file.…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison between RSA and El-Gamal Algorithms for Speech Data Encryption and Decryption

Yousif¹

2023

DJES

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This article presents a performance comparison of two known public key cryptography techniques namely RSA (Rivest–Shamir–Adleman) and El-Gamal algorithms to encrypt/decrypt the speech signals during transferring over open networks. Specifically, this work is divided into two stages. The first stage is enciphering-deciphering the input speech file by employing the RSA method. The second stage is enciphering-deciphering the same input speech file by employing the El-Gamal method. Then, a comparative analysis is performed to test the performance of both cryptosystems using diverse experimental and statistical analyses for the ciphering and deciphering procedures like some known speech quality measures: histogram, spectrogram, correlation, differential, speed performance and noise effect analyses. The analyses outcomes reveal that the RSA and El-Gamal approaches are efficient and adequate for providing high degree of security, confidentiality and reliability. Additionally, the outcomes indicate that the RSA speech cryptosystem outperforms its counterpart the El-Gamal speech cryptosystem in most of ciphering/deciphering speech performance metrics.

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“…Some symmetric systems have an infinite number of periodic orbits or aperiodic trajectories [39][40][41]. The diverse and flexible evolutionary attributes of symmetric chaotic systems give them extensive application value in various fields, such as image encryption [42][43][44][45], speech encryption [46][47][48] and random number generating [49,50].…”

Section: Introductionmentioning

confidence: 99%

Symmetric Strange Attractors: A Review of Symmetry and Conditional Symmetry

Jiang

et al. 2023

Symmetry

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A comprehensive review of symmetry and conditional symmetry is made from the core conception of symmetry and conditional symmetry. For a dynamical system, the structure of symmetry means its robustness against the polarity change of some of the system variables. Symmetric systems typically show symmetrical dynamics, and even when the symmetry is broken, symmetric pairs of coexisting attractors are born, annotating the symmetry in another way. The polarity balance can be recovered through combinations of the polarity reversal of system variables, and furthermore, it can also be restored by the offset boosting of some of the system variables if the variables lead to the polarity reversal of their functions. In this case, conditional symmetry is constructed, giving a chance for a dynamical system outputting coexisting attractors. Symmetric strange attractors typically represent the flexible polarity reversal of some of the system variables, which brings more alternatives of chaotic signals and more convenience for chaos application. Symmetric and conditionally symmetric coexisting attractors can also be found in memristive systems and circuits. Therefore, symmetric chaotic systems and systems with conditional symmetry provide sufficient system options for chaos-based applications.

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A Combined Chaotic System for Speech Encryption

Cited by 11 publications

References 18 publications

Enhancing Speech Privacy through Dynamic Chaos- Driven Scrambling with Nested Segmentation

Enhancing Speech Privacy through Dynamic Chaos- Driven Scrambling with Nested Segmentation

Performance Comparison between RSA and El-Gamal Algorithms for Speech Data Encryption and Decryption

Symmetric Strange Attractors: A Review of Symmetry and Conditional Symmetry

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