Sciweavers

Share
TIT
2010

Cooperation with an untrusted relay: a secrecy perspective

8 years 1 months ago
Cooperation with an untrusted relay: a secrecy perspective
We consider the communication scenario where a source-destination pair wishes to keep the information secret from a relay node despite wanting to enlist its help. For this scenario, an interesting question is whether the relay node should be deployed at all. That is, whether cooperation with an untrusted relay node can ever be beneficial. We first provide an achievable secrecy rate for the general untrusted relay channel, and proceed to investigate this question for two types of relay networks with orthogonal components. For the first model, there is an orthogonal link from the source to the relay. For the second model, there is an orthogonal link from the relay to the destination. For the first model, we find the equivocation capacity region and show that answer is negative. In contrast, for the second model, we find that the answer is positive. Specifically, we show, by means of the achievable secrecy rate based on compress-and-forward, that by asking the untrusted relay node to rela...
Xiang He, Aylin Yener
Added 22 May 2011
Updated 22 May 2011
Type Journal
Year 2010
Where TIT
Authors Xiang He, Aylin Yener
Comments (0)
books