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
fDate :
6/1/1991 12:00:00 AM
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;
Journal_Title :
Communications, Speech and Vision, IEE Proceedings I
