Secure Communication in Stochastic Wireless Networks—Part II: Maximum Rate and Collusion
Secure Communication in Stochastic Wireless Networks—Part II: Maximum Rate and Collusion
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DOI：
10.1109/tifs.2011.2165947
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发表时间：
2012-02
影响因子：
6.8
通讯作者：
P.C. Pinto;J. Barros;M. Win
中科院分区：
文献类型：
--
作者：
P.C. Pinto;J. Barros;M. Win
在本文的第一部分中，我们介绍了本质安全通信图（IS-图）-一个随机图，它描述了在存在窃听者的情况下，可以在大规模网络上建立的具有强保密性的连接。我们重点研究了IS-图的局部连通性，并提出了改进的技术。在第二部分中，我们描述了节点与其邻居之间可以实现的最大保密率（MSR）。然后，我们考虑允许窃听者串通的情况，即，交换和联合收割机信息。我们精确地量化窃听者合谋如何降低网络的保密性能，相比一个noncolluding的情况。我们的分析有助于澄清窃听者的存在如何危及无线物理层安全的成功。
In Part I of this paper, we introduced the intrinsically secure communications graph (iS-graph)-a random graph which describes the connections that can be established with strong secrecy over a large-scale network, in the presence of eavesdroppers. We focused on the local connectivity of the iS-graph, and proposed techniques to improve it. In this second part, we characterize the maximum secrecy rate (MSR) that can be achieved between a node and its neighbors. We then consider the scenario where the eavesdroppers are allowed to collude, i.e., exchange and combine information. We quantify exactly how eavesdropper collusion degrades the secrecy properties of the network, in comparison to a noncolluding scenario. Our analysis helps clarify how the presence of eavesdroppers can jeopardize the success of wireless physical-layer security.