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Reseach Article

A Speech Encryption based on Chaotic Maps

by Saad Najim Al Saad, Eman Hato
International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 93 - Number 4
Year of Publication: 2014
Authors: Saad Najim Al Saad, Eman Hato
10.5120/16203-5488

Saad Najim Al Saad, Eman Hato . A Speech Encryption based on Chaotic Maps. International Journal of Computer Applications. 93, 4 ( May 2014), 19-28. DOI=10.5120/16203-5488

@article{ 10.5120/16203-5488,
author = { Saad Najim Al Saad, Eman Hato },
title = { A Speech Encryption based on Chaotic Maps },
journal = { International Journal of Computer Applications },
issue_date = { May 2014 },
volume = { 93 },
number = { 4 },
month = { May },
year = { 2014 },
issn = { 0975-8887 },
pages = { 19-28 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume93/number4/16203-5488/ },
doi = { 10.5120/16203-5488 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T22:14:57.215887+05:30
%A Saad Najim Al Saad
%A Eman Hato
%T A Speech Encryption based on Chaotic Maps
%J International Journal of Computer Applications
%@ 0975-8887
%V 93
%N 4
%P 19-28
%D 2014
%I Foundation of Computer Science (FCS), NY, USA
Abstract

In this paper a new speech encryption system is presented. It is based on permutation and substitution of speech samples using secret keys in time and transform domains. The system is with multilevel to increase the security and to present an encrypted signal with low residual intelligibility. The logistic map is employed in keys generation to generate permutation and mask keys to be used in the permutation and substitution process. In order to maximize the benefits of the permutation process for the system, Arnold cat map is applied to permute the samples in the last level of encryption system. Simulations results are presented in the paper indicate that the encryption system provides encryption speech signal of low residual intelligibility, key sensitivity and high quality recovered signal. Total key space for the proposed encryption system is (2^348), which is large enough to protect the encryption signal against brute-force attack.

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Index Terms

Computer Science
Information Sciences

Keywords

Speech encryption Logistic map Arnold cat map Permutation Substitution Residual intelligibility.