We consider reversely-degraded wiretap channels, for which the secrecy capacity is zero if there is no channel feedback. This work focuses on a seeded modular code design for the Gaussian wiretap channel with channel output feedback, combining universal hash functions for security and learned feedback-based codes for reliability to achieve positive secrecy rates. We study the trade-off between communication reliability and information leakage, illustrating that feedback enables agreeing on a secret key shared between legitimate parties, overcoming the security advantage of the wiretapper. Our findings also motivate code designs for sensing-assisted secure communication, to be used in next-generation integrated sensing and communication methods.

翻译：本文研究反向退化窃听信道，该类信道在无反馈条件下保密容量为零。针对具有信道输出反馈的高斯窃听信道，本工作提出一种基于种子的模块化编码设计方案，通过结合用于安全性的通用哈希函数与用于可靠性的基于学习的反馈编码，实现了正保密速率。我们分析了通信可靠性与信息泄露之间的权衡关系，证明反馈机制可使合法通信方协商共享密钥，从而克服窃听者的安全优势。本研究的发现同时为感知辅助安全通信的编码设计提供了启示，这类编码可应用于下一代集成感知与通信技术中。