Feedback Codes Enable Secure Communication Over Wiretap Channels
A recent study introduces a seeded modular code framework tailored for the block-fading Gaussian wiretap channel, incorporating channel-output feedback. This approach merges universal hash functions to enhance security with feedback-based codes that improve reliability. The research focuses on reversely-degraded secure communication channels, highlighting that without feedback, the secrecy capacity is nonexistent. By facilitating a mutual agreement on a secret key among authorized parties, feedback mitigates the security edge held by eavesdroppers. Additionally, the analysis explores the balance between communication reliability and potential information leakage. These insights pave the way for code development aimed at secure communications aided by sensing in integrated sensing and communication (ISAC) systems.
Key facts
- Reversely-degraded secure-communication channels have zero secrecy capacity without feedback.
- The study focuses on the block-fading Gaussian wiretap channel with channel-output feedback.
- The code design uses universal hash functions for security and learned feedback-based codes for reliability.
- Feedback enables agreeing on a secret key shared between legitimate parties.
- The trade-off between communication reliability and information leakage is studied.
- The findings motivate code designs for sensing-assisted secure communications in ISAC.
- The paper is published on arXiv under identifier 2510.16620.
- The research is in the field of information theory.
Entities
Institutions
- arXiv