Encryption-Aware PHY Security for Wiretap Channels with Multiple Independent Jammers
Encryption-Aware PHY Security for Wiretap Channels with Multiple Independent Jammers
复制标题
DOI：
10.1109/wts202356685.2023.10131796
复制
发表时间：
2023-04
期刊：
影响因子：
--
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方案中，不容忍将私有信息泄露给敌方节点，并且不考虑信息加密的假设。这是物理层安全性的限制性假设，会损害此类方案的效率。本文介绍了一种方法，其中加密的先验知识可用于提高高斯窃听通道中协作干扰的安全性能，作为物理层安全方法的示例。然而，所提出的方法并不限于所考虑的协作干扰场景，并且可以应用于其他场景。我们考虑一个由发射机、接收机、窃听器和多个独立工作的干扰节点组成的系统，并制定一个优化问题，以利用加密知识最大化保密率，并尝试通过驱动速率模糊区域来约束和确定解决方案的可行性来解决该问题。然后，我们利用线性近似来解决所产生的非凸优化问题，以最大化安全传输速率。我们的数值结果表明，可以利用加密的先验知识将可用功率分配给干扰节点，以显着提高安全传输速率。
In conventional physical layer security schemes no leakage of private information to adversary nodes is tolerated, and no assumption on the encryption of information is considered. This is a limiting assumption in physical layer security, which compromises the efficiency of such schemes. This paper introduces an approach in which a prior knowledge of encryption can be used to improve the security performance of cooperative jamming in Gaussian wiretap channels as an example of physical layer security approached. The proposed approach, however, is not limited to the considered scenario of cooperative jamming and can be applied to other scenarios. We consider a system composed of a transmitter, a receiver, and eavesdropper and several jamming nodes that work independently, and formulate an optimization problem to maximize the secrecy rate with the knowledge of encryption and attempt to solve it by driving the rate-equivocation region to constrain and determine the feasibility of the solution. We then exploit a linear approximation to solve the resulted nonconvex optimization problem to maximize the secure transmission rate. Our numerical results show that prior knowledge of encryption can be exploited to allocate the available power to the jamming nodes to significantly increase the secure transmission rate.