Frequency-domain speech scrambling/descrambling techniques implementation and evaluation on DSP

Author

Ahmed, Jameel ; Ikram, Nassar

Author_Institution

Pakistan Navy Eng. Coll. Karachi

fYear

2003

fDate

9-9 Dec. 2003

Firstpage

44

Lastpage

48

Abstract

Speech scrambling/descrambling has always been a key component in secure communication systems. The paper describes the real-time implementation of frequency-domain speech scrambling/descrambling techniques on Texas Instruments´ TMS320C6711 DSP. Three techniques, frequency-inversion, frequency hopping inversion and rolling code inversion, have been successfully implemented. Subsequently, the results of these techniques are evaluated and compared on the basis of their level of security

Keywords

digital signal processing chips; frequency hop communication; speech coding; telecommunication security; DSP; Texas Instruments TMS320C6711; frequency hopping inversion; frequency-domain speech descrambling; frequency-domain speech scrambling; frequency-inversion; rolling code inversion; secure communication systems; Cryptography; Digital signal processing; Educational institutions; Filtering algorithms; Frequency; Instruments; Military communication; Security; Signal processing algorithms; Speech analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Multi Topic Conference, 2003. INMIC 2003. 7th International

Conference_Location

Islamabad

Print_ISBN

0-7803-8183-1

Type

conf

DOI

10.1109/INMIC.2003.1416613

Filename

1416613