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Approximate Secrecy Capacity of Gaussian Parallel Relay Networks
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-7926-5081
2015 (English)In: IEEE Transactions on Information Theory, ISSN 0018-9448, E-ISSN 1557-9654, Vol. 61, no 10, 5525-5534 p.Article in journal (Refereed) Published
Abstract [en]

We consider a Gaussian relay network, which has to protect the message from a powerful eavesdropper, which has the possibility of listening to the transmitted signals on orthogonal channels. The secrecy capacity of the Gaussian network is approximated by considering the corresponding network in the deterministic discrete superposition model. Upper and lower bounds on the secrecy capacity are found in terms of the deterministic model, which are potentially easier to evaluate. We perform this evaluation for the particular topology of the parallel relay network, where the relays form a parallel layer between the source and the destination. By analyzing the deterministic model, we approximate the secrecy capacity within a constant gap. The approximation can be expressed just in terms of the channel gains of the network. It is therefore possible to deduct that the simple scheme of hiding the transmitted signals in noise is approximately optimal.

Place, publisher, year, edition, pages
IEEE , 2015. Vol. 61, no 10, 5525-5534 p.
Keyword [en]
AWGN channels, channel models, channel capacity, communication networks, communication system security
National Category
Communication Systems Telecommunications Computer Science
Identifiers
URN: urn:nbn:se:kth:diva-174913DOI: 10.1109/TIT.2015.2468216ISI: 000361486800020Scopus ID: 2-s2.0-84959333266OAI: oai:DiVA.org:kth-174913DiVA: diva2:865439
Funder
Swedish Research Council
Note

QC 20151028

Available from: 2015-10-28 Created: 2015-10-09 Last updated: 2017-12-01Bibliographically approved

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Skoglund, Mikael

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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