A novel approach based on stream cipher for selective speech encryption

Belmeguenaï, Aïssa; Ahmida, Zahir; Ouchtati, Salim; Djemii, Rafik

doi:10.1007/s10772-017-9439-8

Cited by 22 publications

(9 citation statements)

References 9 publications

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“…Unfortunately, the random projection based on DCT, salting, and logistic map encryption has histogram distributions that are not uniform enough, making them less resistant to histogram-based statistical assaults. 6), and we suggest referring to [25] for further details.…”

Section: Statistical Metricsmentioning

confidence: 99%

A Multilayered Audio Signal Encryption Approach for Secure Voice Communication

Abdallah¹,

Meshoul²

2022

Electronics

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In this paper, multilayer cryptosystems for encrypting audio communications are proposed. These cryptosystems combine audio signals with other active concealing signals, such as speech signals, by continuously fusing the audio signal with a speech signal without silent periods. The goal of these cryptosystems is to prevent unauthorized parties from listening to encrypted audio communications. Preprocessing is performed on both the speech signal and the audio signal before they are combined, as this is necessary to get the signals ready for fusion. Instead of encoding and decoding methods, the cryptosystems rely on the values of audio samples, which allows for saving time while increasing their resistance to hackers and environments with a noisy background. The main feature of the proposed approach is to consider three levels of encryption namely fusion, substitution, and permutation where various combinations are considered. The resulting cryptosystems are compared to the one-dimensional logistic map-based encryption techniques and other state-of-the-art methods. The performance of the suggested cryptosystems is evaluated by the use of the histogram, structural similarity index, signal-to-noise ratio (SNR), log-likelihood ratio, spectrum distortion, and correlation coefficient in simulated testing. A comparative analysis in relation to the encryption of logistic maps is given. This research demonstrates that increasing the level of encryption results in increased security. It is obvious that the proposed salting-based encryption method and the multilayer DCT/DST cryptosystem offer better levels of security as they attain the lowest SNR values, −25 dB and −2.5 dB, respectively. In terms of the used evaluation metrics, the proposed multilayer cryptosystem achieved the best results in discrete cosine transform and discrete sine transform, demonstrating a very promising performance.

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Section: Statistical Metricsmentioning

confidence: 99%

A Multilayered Audio Signal Encryption Approach for Secure Voice Communication

Abdallah¹,

Meshoul²

2022

Electronics

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“…They introduced Hybrid Chaotic Shift Transform (HCST), and deoxyribonucleic acid (DNA) encoding rules to enhance the security level. Aissa Belmeguenai et al proposed a method, where only relevant part of the speech segment undergoes encryption process [31]. Animesh Roy et al [32] presented an algorithm based on audio signal encryption using chaotic Henon map and lifting wavelet transform.…”

Section: Acimentioning

confidence: 99%

“…We have compared our proposed algorithm with advanced encryption standard (AES), Data Encryption Standard (triple DES), algorithm based on quantum chaotic system [16] and an algorithm based on substitution-permutation chaotic network [20]. Speech encryption algorithm based on Zaslavsky map [8], TD-ERCS chaotic map [33], multiple chaotic shift keying [29] and a non-chaotic [31], method are also considered for comparative analysis. The size of the proposed method’s key space is greater than 2 540 (Section 4.5).…”

Section: Comparison With Existing Workmentioning

confidence: 99%

An audio encryption scheme based on Fast Walsh Hadamard Transform and mixed chaotic keystreams

Farsana

Devi

Gopakumar³

2020

ACI

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This paper introduces an audio encryption algorithm based on permutation of audio samples using discrete modified Henon map followed by substitution operation with keystream generated from the modified Lorenz-Hyperchaotic system. In this work, the audio file is initially compressed by Fast Walsh Hadamard Transform (FWHT) for removing the residual intelligibility in the transform domain. The resulting file is then encrypted in two phases. In the first phase permutation operation is carried out using modified discrete Henon map to weaken the correlation between adjacent samples. In the second phase it utilizes modified-Lorenz hyperchaotic system for substitution operation to fill the silent periods within the speech conversation. Dynamic keystream generation mechanism is also introduced to enhance the correlation between plaintext and encrypted text. Various quality metrics analysis such as correlation, signal to noise ratio (SNR), differential attacks, spectral entropy, histogram analysis, keyspace and key sensitivity are carried out to evaluate the quality of the proposed algorithm. The simulation results and numerical analyses demonstrate that the proposed algorithm has excellent security performance and robust against various cryptographic attacks.

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“…A mixture of chaos functions has been used for audio encryption in [36]. A novel approach based on stream cipher for selective speech encryption has been introduced in [37]. A chaotic shift keying using multiple permutations has been introduced in [38].…”

Section: Introductionmentioning

confidence: 99%

Audio Encryption Scheme Using Self-Adaptive Bit Scrambling and Two Multi Chaotic-Based Dynamic DNA Computations

Abdelfatah

2020

IEEE Access

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In this paper, a novel scheme for secure audio transmission is introduced. The novelty of this scheme is that it combines four different techniques for audio encryption in the same scheme which makes it more secure: self-adaptive scrambling, multi chaotic maps, dynamic DNA encoding and cipher feedback encryption. Also, it introduces two new designed multi chaotic maps as pseudo random generators that combine five different chaotic maps with eight control parameters. The scheme consists of three phases with three secret keys. The first phase is a self-adaptive bit scrambling where SHA512 of the input audio is computed to be used as a first secret key for cyclic shifting the input audio binary stream which efficiently reduces the strong correlation between neighboring audio samples. The second phase is a dynamic DNA encoding of the scrambled audio by using a second secret key obtained from a pseudo random generator (LCS) using a novel design of multi chaotic maps including Sine, Chebyshev and Logistic map with three control parameters. As DNA encoding provides fast computations and large capacity for data transmission, the third phase consists of two DNA algebraic operations ''AND'' and ''XOR'' using a pseudorandom DNA sequence as a third secret key generated by another new designed multi chaotic HLG map which combines Henon, Logistic and Gaussian chaotic maps and has five control parameters. The third phase is structured in a cipher feedback mode and so it achieves strong diffusion and confusion in the encrypted audio. Also combining five different chaotic maps in the proposed scheme increases the number of secret control parameters which achieves a huge key space and so robust strength against brute force attacks. The scheme is evaluated by using different measurements including signal to noise ratio (SNR), peak signal to noise ratio (PSNR), number of samples change rate (NSCR), unified average changing intensity (UACI), root mean square (RMS), crest factor (CF), correlation coefficient, histogram, key sensitivity and key space. From results, it is clear that the scheme is highly secure and stronger than many recent similar audio encryption schemes against different types of attacks.INDEX TERMS Audio encryption, DNA encoding, chaotic maps, security analysis.

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A novel approach based on stream cipher for selective speech encryption

Cited by 22 publications

References 9 publications

A Multilayered Audio Signal Encryption Approach for Secure Voice Communication

A Multilayered Audio Signal Encryption Approach for Secure Voice Communication

An audio encryption scheme based on Fast Walsh Hadamard Transform and mixed chaotic keystreams

Audio Encryption Scheme Using Self-Adaptive Bit Scrambling and Two Multi Chaotic-Based Dynamic DNA Computations

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