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，该信道在没有信道反馈的情况下保密容量为零。本工作聚焦于具有信道输出反馈的高斯窃听信道的种子模块化编码设计，结合用于安全性的通用哈希函数和用于可靠性的基于学习的反馈编码，以实现正的保密速率。我们研究了通信可靠性与信息泄露之间的权衡关系，阐明了反馈能够使合法双方就共享的密钥达成一致，从而克服窃听者的安全优势。我们的研究结果也为传感辅助安全通信的编码设计提供了启示，这类编码可用于下一代集成传感与通信方法。