[Resource Topic] 2025/1948: Feedback Lunch: Deep Feedback Codes for Wiretap Channels

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Title:
Feedback Lunch: Deep Feedback Codes for Wiretap Channels

Authors: Yingyao Zhou, Natasha Devroye, Onur Günlü

Abstract:

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.

ePrint: https://eprint.iacr.org/2025/1948

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