Security of classic PN-spreading codes for hybrid DS/FH spread-spectrum systems

Xiao Ma, Mohammed M. Olama, Teja Kuruganti, Stephen F. Smith, Seddik M. Djouadi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

Hybrid direct sequence/frequency hopping (DS/FH) spread-spectrum communication systems have recently received considerable interest in commercial applications in addition to their use in military communications because they accommodate high data rates with high link integrity, even in the presence of significant multipath effects and interfering signals. The security of hybrid DS/FH systems strongly depends on the choice of PN-spreading code employed. In this paper, we examine the security, in terms of unicity distance, of linear maximal-length, Gold, and Kasami PN-spreading codes for DS, FH, and hybrid DS/FH spread-spectrum systems without additional encryption methods. The unicity distance is a measure of the minimum amount of ciphertext required by an eavesdropper to uniquely determine the specific key used in a cryptosystem and hence break the cipher. Numerical results are presented to compare the security of the considered PN-spreading codes under known-ciphertext attacks.

Original languageEnglish
Title of host publicationProceedings - 2013 IEEE Military Communications Conference, MILCOM 2013
Pages957-962
Number of pages6
DOIs
StatePublished - 2013
Event2013 IEEE Military Communications Conference, MILCOM 2013 - San Diego, CA, United States
Duration: Nov 18 2013Nov 20 2013

Publication series

NameProceedings - IEEE Military Communications Conference MILCOM

Conference

Conference2013 IEEE Military Communications Conference, MILCOM 2013
Country/TerritoryUnited States
CitySan Diego, CA
Period11/18/1311/20/13

Keywords

  • Direct sequence
  • Feedback shift register
  • Frequency hopping
  • PN-sequence
  • Spread-spectrum
  • Unicity distance

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