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Secrecy Capacity Sc...
Secrecy Capacity Scaling in Large Cooperative Wireless Networks
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Mirmohseni, Mahtab (författare)
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- Papadimitratos, Panagiotis Panos (författare)
- KTH,Kommunikationsnät
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(creator_code:org_t)
- IEEE Press, 2017
- 2017
- Engelska.
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Ingår i: IEEE Transactions on Information Theory. - : IEEE Press. - 0018-9448 .- 1557-9654. ; 63:3, s. 1923-1939
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We investigate large wireless networks subject to security constraints. In contrast to point-to-point, interference-limited communications considered in prior works, we propose active cooperative relaying-based schemes. We consider a network with n(l) legitimate nodes, n(e) eavesdroppers, and path loss exponent alpha >= 2. As long as n(e)(2)(log(n(e))(gamma) = o(n(l)), for some positive gamma, we show that one can obtain unbounded secure aggregate rate. This means zero-cost secure communication, given fixed total power constraint for the entire network. We achieve this result through: 1) the source using Wyner randomized encoder and a serial ( multi-stage) block Markov scheme, to cooperate with the relays and 2) the relays acting as a virtual multi-antenna to apply beamforming against the eavesdroppers. Our simpler parallel ( two-stage) relaying scheme can achieve the same unbounded secure aggregate rate when n(e)(alpha/2+1) (log(n(e))(gamma+delta(alpha/2+1)) = o(n(l)) holds, for some positive gamma, delta. Finally, we study the improvement (to the detriment of legitimate nodes) that the eavesdroppers achieve in terms of the information leakage rate in a large cooperative network in the case of collusion. We show that again the zero-cost secure communication is possible, if n(e)((2+2/alpha)) (log n(e))(gamma) = o(n(l)) holds, for some positive gamma; that is, in the case of collusion slightly fewer eavesdroppers can be tolerated compared with the non-colluding case.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- Secrecy capacity
- scaling laws
- cooperative strategies
- relaying
- large wireless networks
- information-theoretic security
- colluding eavesdroppers
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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