Physical layer deception (PLD) is a novel security mechanism that combines physical layer security (PLS) with deception technologies to actively defend against eavesdroppers. In this paper, we establish a novel semantic model for PLD that evaluates its performance in terms of semantic distortion. By analyzing semantic distortion at varying levels of knowledge on the receiver's part regarding the key, we derive the receiver's optimal decryption strategy, and consequently, the transmitter's optimal deception strategy. The proposed semantic model provides a more generic understanding of the PLD approach independent from coding or multiplexing schemes, and allows for efficient real-time adaptation to fading channels.

翻译：物理层欺骗（PLD）是一种结合物理层安全（PLS）与欺骗技术的新型安全机制，旨在主动防御窃听者。本文为PLD建立了一种新颖的语义模型，该模型从语义失真的角度评估其性能。通过分析接收方在不同密钥知识水平下的语义失真，我们推导出接收方的最优解密策略，进而得到发送方的最优欺骗策略。所提出的语义模型提供了对PLD方法更通用的理解，独立于编码或多路复用方案，并允许对衰落信道进行高效的实时适应。