Encryption-Aided Physical Layer Security via Cooperative Jamming: Beyond Secrecy Capacity with Noisy Ciphertext
Encryption-Aided Physical Layer Security via Cooperative Jamming: Beyond Secrecy Capacity with Noisy Ciphertext
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DOI：
10.1109/wcnc55385.2023.10118748
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发表时间：
2023-03
期刊：
影响因子：
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通讯作者：
Tarig Sadig;Mehdi Maleki;N. Tran;H. Bahrami
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文献类型：
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作者：
Tarig Sadig;Mehdi Maleki;N. Tran;H. Bahrami
在这项工作中，我们提出了一个联合的安全方法的基础上，物理层安全（PhySec）和噪声密文，以提高保密率的中继网络与合作干扰通过两个可信的中继。虽然保密能力已被认为是一个完美的保密在物理层的最大限制，我们证明，在加密和它的相互作用，容易出错的密文的考虑允许我们传输以上的PhySec容量没有任何泄漏。通过制定和解决一个非凸的加密辅助的保密率最大化问题，它表明，超越PhySec容量性能可以实现，即使在一个简单的干扰情况下，其中两个干扰只是发送独立的干扰信号。在干扰信号相同的情况下，建立了最优的抗干扰功率分配和保密率最大化解，进一步提高了保密率。最后，数值结果证明了所提出的联合安全框架的优越性，传统的PhySec。
In this work, we propose a joint security approach based on physical layer security (PhySec) and noisy ciphertext to improve the secrecy rate of a relay network with cooperative jamming via two trusted relays. While the secrecy capacity has been considered as the maximum limit for a perfect secrecy at the physical layer, we demonstrate that the consideration of error- prone ciphertext in encryption and its interaction with PhySec allows us to transmit above the PhySec capacity without any leakage. By formulating and solving a non-convex encryption- aided secrecy rate maximization problem, it is shown that beyond PhySec capacity performances can be achieved even in a simple jamming scenario in which the two jammers just send independent jamming signals. The optimal encryption-aware power allocation and the secrecy rate maximization solution are also established in the case of common jamming signals to further increase the secrecy rate. Numerical results are finally provided to demonstrate the superiority of the proposed joint security framework over traditional PhySec.