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arXiv · 2510.16620

Feedback Lunch: Learned Feedback Codes for Secure Communications

Yingyao Zhou·Natasha Devroye·Onur Günlü
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Abstract

We consider reversely-degraded secure-communication channels, for which the secrecy capacity is zero if there is no channel feedback. Specifically, we focus on a seeded modular code design for the block-fading Gaussian wiretap channel with channel-output feedback, combining universal hash functions for security and learned feedback-based codes for reliability. The trade-off between communication reliability and information leakage is studied, illustrating that feedback enables agreeing on a secret key shared between legitimate parties, overcoming the security advantage of the eavesdropper. Our findings motivate code designs for sensing-assisted secure communications in the context of integrated sensing and communication (ISAC).

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Yingyao Zhou, Natasha Devroye, Onur Günlü. 2025-10-18. Feedback Lunch: Learned Feedback Codes for Secure Communications. https://arxiv.org/abs/2510.16620

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