Colluding eavesdroppers in large cooperative wireless networks
2014 (English)In: IWCIT 2014 - Iran Workshop on Communication and Information Theory, IEEE , 2014Conference paper (Refereed)
Securing communication against non-colluding passive eavesdroppers has been extensively studied. Colluding eavesdroppers were considered for interference-limited large networks. However, collusion was not investigated for large cooperative networks. This paper closes this gap: we study the improvement the eavesdroppers achieve due to collusion in terms of the information leakage rate in a large cooperative network. We consider a dense network with nl legitimate nodes, ne eavesdroppers, and path loss exponent α ≥ 2. We show that if ne (2+2/α) (log ne)γ = o(n l) holds, for some positive γ, then zero-cost secure communication is possible; i.e., ne colluding eavesdroppers can be tolerated. This means that our scheme achieves unbounded secure aggregate rate, given a fixed total power constraint for the entire network.
Place, publisher, year, edition, pages
IEEE , 2014.
Information theory, Colluding eavesdroppers, Cooperative networks, Cooperative wireless networks, Information leakage, Large networks, Passive eavesdroppers, Path loss exponent, Secure communications, Communication
IdentifiersURN: urn:nbn:se:kth:diva-168885DOI: 10.1109/IWCIT.2014.6842500ISI: 000364099400020ScopusID: 2-s2.0-84904556071ISBN: 9781479948772OAI: oai:DiVA.org:kth-168885DiVA: diva2:819331
2014 Iran Workshop on Communication and Information Theory, IWCIT 2014, 7 May 2014 through 8 May 2014, Tehran
QC 201506102015-06-102015-06-092015-12-02Bibliographically approved