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UPT Chaos-Based Encryption Characteristic Analysis for Speech Signal

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Abstract:

In chaotic speech signal encryption, masking is the most direct and convenient method. But the chaotic signals usually have a narrow spectral range in low frequency region. In order to overcome the disadvantage that the higher frequency signals can not be completely covered up, UPT is used to conduct a nonlinear transformation to chaotic signal. After UPT, chaotic types are increased, chaotic characteristics are improved and spectral range is widened. Simulation experiments are done respectively from frequency domain and spectrogram perspectives. The chaos before and after transformation are used to mask speech signal. Decoding experiment is taken on the speech encrypted by transformed chaos. Experiment results show that, after UPT, the encryption effect of speech signal is improved obviously. This method has a high security and a strong anti-attack ability.

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Info:

Periodical:

Applied Mechanics and Materials (Volumes 713-715)

Pages:

1456-1459

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.713-715.1456

Citation:

Cite this paper

Online since:

January 2015

Authors:

Hong Chen*, Cheng Chen, Shu Bin Gu

Keywords:

Chaos Encryption, Speech Encryption, Speech Signal Processing, UPT

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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