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Audio block encryption using 3D chaotic system with adaptive parameter perturbation

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Abstract

To ensure the sensitive audio data transmit securely over the insecure internet, we proposed a chaos based dual-channel audio block encryption algorithm. A 3D chaotic system is served as pseudo random number generator to encrypt the audio data in time domain through confusion and diffusion. The encryption process includes, (1) generating initial values of chaotic system based on random external values and hash value of plain audio; (2) before encrypting each block, iterate the chaotic system with adaptive parameter perturbation to generate confusion and diffusion sequences; (3) divide the plain audio data into blocks with the same size, confuse and diffuse the time domain vector of each block. Experimental and analysis results demonstrated that, for a 60 second dual-channel wave file with 44.1 kHz and 16-bit quantization, its encryption or decryption speed is only about 1 second, hence the proposed scheme is so suitable for real-time secure communication.

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Acknowledgments

This research is supported by the Natural Science Foundation of Shandong Province (No. ZR2022MF232), the General Research Project of Liaoning Provincial Education Department of China (No. LJKZ1185).

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  1. School of Mathematical Sciences, University of Jinan, Jinan, 250022, China

    Hongjun Liu

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  1. Hongjun Liu
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Correspondence to Hongjun Liu.

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Liu, H. Audio block encryption using 3D chaotic system with adaptive parameter perturbation. Multimed Tools Appl 82, 27973–27987 (2023). https://doi.org/10.1007/s11042-023-14572-1

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