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The Wiretap Channel With Generalized Feedback: Secure Communication and Key Generation
KTH, School of Electrical Engineering and Computer Science (EECS), Information Science and Engineering. Univ Paris Sud, CNRS, Cent Supelec, Lab Signaux & Syst,L2S,UMR 8506, F-91192 Gif Sur Yvette, France.ORCID iD: 0000-0002-8974-6591
2019 (English)In: IEEE Transactions on Information Theory, ISSN 0018-9448, E-ISSN 1557-9654, Vol. 65, no 4, p. 2213-2233Article in journal (Refereed) Published
Abstract [en]

It is a well-known fact that feedback does not increase the capacity of point-to-point memoryless channels, however, its effect in secure communications is not fully understood yet. In this paper, an achievable scheme for the wiretap channel with generalized feedback is presented. This scheme, which uses the feedback signal to generate a shared secret key between the legitimate users, encrypts the message to be sent at the bit level. New capacity results for a class of channels are provided, as well as some new insights into the secret key agreement problem. Moreover, this scheme recovers previously reported rate regions from the literature, and thus it can be seen as a generalization that unifies several results in the field.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2019. Vol. 65, no 4, p. 2213-2233
Keywords [en]
Information-theoretic security, wiretap channel, feedback, secret key, secrecy capacity, secret key capacity
National Category
Computer Sciences
Identifiers
URN: urn:nbn:se:kth:diva-248318DOI: 10.1109/TIT.2018.2883299ISI: 000461840600019Scopus ID: 2-s2.0-85057424811OAI: oai:DiVA.org:kth-248318DiVA, id: diva2:1303620
Note

QC 20190410

Available from: 2019-04-10 Created: 2019-04-10 Last updated: 2019-04-10Bibliographically approved

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