Key Agreement over Multiple Access Channel Using Feedback Channel
2011 (English)Conference paper (Refereed)
In this paper, the effect of using an insecure and noiseless feedback channel in increasing secret key rates is investigated. There is a generalized discrete memoryless multiple access channel (GDMMAC) between two transmitters and a receiver where, in addition to the receiver, both of the transmitters receive noisy channel outputs. Furthermore, an insecure and noiseless feedback channel exists from the receiver to the transmitters. Each of the transmitters intends to share a secret key with the receiver while keeping it concealed from the other transmitter. For this setup, an inner bound of the secret key capacity region is derived. For some special cases, the secret key capacity region is obtained, and the effect of the feedback channel usage is discussed through a binary-erasure example as well as in the Gaussian case.
Place, publisher, year, edition, pages
2011. 1936-1940 p.
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-96683ISI: 000297465102050ISBN: 978-1-4577-0595-3OAI: oai:DiVA.org:kth-96683DiVA: diva2:532019
International Symposium of Information Theory
QC 201206252012-06-082012-06-082012-06-25Bibliographically approved