Secrecy Capacity of the Wiretap Channel with Noisy Feedback
| dc.creator | Lai, Lifeng | |
| dc.creator | Gamal, Hesham El | |
| dc.creator | Poor, H. Vincent | |
| dc.date | 2007-10-03 | |
| dc.date.accessioned | 2026-07-07T08:33:48Z | |
| dc.date.available | 2026-07-07T08:33:48Z | |
| dc.description | In this work, the role of noisy feedback in enhancing the secrecy capacity of the wiretap channel is investigated. A model is considered in which the feed-forward and feedback signals share the same noisy channel. More specifically, a discrete memoryless modulo-additive channel with a full-duplex destination node is considered first, and it is shown that a judicious use of feedback increases the perfect secrecy capacity to the capacity of the source-destination channel in the absence of the wiretapper. In the achievability scheme, the feedback signal corresponds to a private key, known only to the destination. Then a half-duplex system is considered, for which a novel feedback technique that always achieves a positive perfect secrecy rate (even when the source-wiretapper channel is less noisy than the source-destination channel) is proposed. These results hinge on the modulo-additive property of the channel, which is exploited by the destination to perform encryption over the channel without revealing its key to the source. | |
| dc.description | To appear in the Proceedings of the 45th Annual Allerton Conference on Communication, Control and Computing, Monticello, IL, September 26 - 28, 2007 | |
| dc.identifier | https://arxiv.org/abs/0710.0865 | |
| dc.identifier | http://arxiv.org/abs/0710.0865 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/139257 | |
| dc.subject | Information Theory | |
| dc.subject | Cryptography and Security | |
| dc.title | Secrecy Capacity of the Wiretap Channel with Noisy Feedback | |
| dc.type | text |