DocumentCode
1399786
Title
Fast Fourier transform based speech encryption system
Author
Sridharan, S. ; Dawson, E. ; Goldburg, B.
Author_Institution
Sch. of Electr. & Electron. Eng., Queensland Univ. of Technol., Brisbane, Qld., Australia
Volume
138
Issue
3
fYear
1991
fDate
6/1/1991 12:00:00 AM
Firstpage
215
Lastpage
223
Abstract
A speech encryption system based on permutation of DFT coefficients is described. This system was designed for use on a band limited telephone channel. The choice of permutation matrices and methods of synchronisation are discussed. Results of subjective and objective tests performed on the system are given which indicate low residual intelligibility and good recovered voice quality. The cryptanalytic strength of the system is also considered.<>
Keywords
cryptography; fast Fourier transforms; speech analysis and processing; telecommunication channels; telephony; DFT coefficients; band limited telephone channel; cryptanalytic strength; fast Fourier transform bases speech encryption system; intelligibility; permutation matrices; recovered voice quality; speech encryption system; synchronisation;
fLanguage
English
Journal_Title
Communications, Speech and Vision, IEE Proceedings I
Publisher
iet
ISSN
0956-3776
Type
jour
Filename
87868
Link To Document