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- W2979786074 abstract "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." @default.
- W2979786074 created "2019-10-18" @default.
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- W2979786074 date "2020-08-14" @default.
- W2979786074 modified "2023-10-10" @default.
- W2979786074 title "An audio encryption scheme based on Fast Walsh Hadamard Transform and mixed chaotic keystreams" @default.
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- W2979786074 doi "https://doi.org/10.1016/j.aci.2019.10.001" @default.
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