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Murtadha K. Khashan
University of Babylon
Computer Science & IT Electrical & Electronics Engineering

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Journal : international journal of electrical and computer engineering

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A high security and noise immunity of speech based on double chaotic masking Ehab AbdulRazzaq Hussein; Murtadha K. Khashan; Ameer K. Jawad
International Journal of Electrical and Computer Engineering (IJECE) Vol 10, No 4: August 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (878.689 KB) | DOI: 10.11591/ijece.v10i4.pp4270-4278

Abstract

It is known that increasing the security of the information and reducing the noise effect through public channels are two of the main priorities in developing any communication system. In this article, an efficient, secure communication system with two levels of encryption has been applied to the speech signal. The suggested security approach was implemented by using two different stages of chaotic masking on the signal; one masking was conducted by using Lorenz system and the other masking was built by using RÓ§ssler chaotic flow system. The main goal of developing this two-chaotic masking approach is to increase the key space and the security of the information. Also, an immunity technique has been implemented in the suggested approach to reduce the noise effect. For practical application purposes, this system was tested with additive white gaussian noise (AWGN) channel. The simulation results show that the quality of reconstructed speech signal is changeable according to the used signal to noise ratio (SNR); therefore, a proposed technique based on digital processing method (DPM) was applied to the first masked signal by converting the sampled data from the analog to the binary format. The simulation results show that an 22 dB (SNR) is sufficient to recover the speech signal with minimum noise by using the suggested approach.
Co-Authors Ameer K. Jawad Ehab AbdulRazzaq Hussein