An Encryption-Aware PHY Security Framework for 4-Node Gaussian Wiretap Channels With Joint Power Constraint
An Encryption-Aware PHY Security Framework for 4-Node Gaussian Wiretap Channels With Joint Power Constraint
复制标题
DOI：
10.1109/tcomm.2020.3024825
复制
发表时间：
2020-12
影响因子：
8.3
通讯作者：
Tarig Sadig;Mehdi Maleki;N. Tran;H. Bahrami
中科院分区：
文献类型：
--
作者：
Tarig Sadig;Mehdi Maleki;N. Tran;H. Bahrami
在传统的物理层安全范式中，无论消息是否加密，都不允许机密信息泄露给窃听者。这将导致可实现的安全传输速率明显小于信道容量。本文提出了一种新颖的方法，它允许将物理层安全性与加密结合起来处理，从而实现系统资源的灵活权衡。我们提出了一个新的框架来模拟易出错密文中安全传输速率和错误概率之间的相互作用。为此，我们使用速率模糊区域的概念来建立这种联系。为了清楚地描述我们的框架的应用，我们考虑了4节点高斯窃听信道的情况。对于这种信道，我们对不同场景下的速率模糊区域进行了表征，然后利用它来研究加密感知物理层安全的可实现速率。研究结果表明，在传输功率一定的情况下，加密的先验知识可以显著提高安全传输速率。此外，与传统的与加密无关的物理层安全相比，加密感知的物理层安全可以以更低的传输功率实现目标传输速率。
In traditional physical layer security paradigm, no leakage of confidential information to the eavesdropper is tolerated regardless of whether the message is encrypted or not. This will result in an achievable secure transmission rate that is significantly smaller than the channel capacity. This article presents a novel approach that allows treatment of physical layer security in conjunction with encryption to achieve a flexible trade-off of system resources. We propose a novel framework to model the interplay between secured transmission rate and error probability in error prone ciphertexts. To this end, we use the concept of rate-equivocation region to establish such a connection. To clearly describe the application of our framework, we consider the case of 4-node Gaussian wiretap channel. For such a channel, we characterize the rate-equivocation region in different scenarios, and then use it to study the achievable rate of encryption-aware physical layer security. The obtained results show that, for a fixed transmission power, the prior knowledge of encryption can significantly increase the secured transmission rate. In addition, encryption-aware physical layer security can achieve a target transmission rate at a reduced transmission power compared to the conventional encryption-agnostic physical layer security.