Secure key agreement over reciprocal fading channels in the low SNR regime
2013 (English)In: 2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications, SPAWC, IEEE , 2013, 674-678 p.Conference paper (Refereed)
We study the low SNR scaling of the non-coherent secret-key agreement capacity over a reciprocal, block-fading channel. For the restricted class of strategies, where one of the nodes is constrained to transmit pilot-only symbols, we show that the secret-key capacity scales as SNR ·log T if T ≤ 1/SNR, where T denotes the coherence period, and as SNR·log(1/SNR) otherwise. Our upper bound is inspired by the genie-aided argument of Borade and Zheng (IT-Trans 2010). Our lower bound is based on bursty communication, channel training, and secret message transmission.
Place, publisher, year, edition, pages
IEEE , 2013. 674-678 p.
, IEEE International Workshop on Signal Processing Advances in Wireless Communications, ISSN 2325-3789
Block fading channel, Channel trainings, Key agreement, Low-snr regimes, Lower bounds, Secret messages, Secret-key agreements, Upper Bound, Fading channels, Signal processing, Testbeds, Wireless telecommunication systems, Signal to noise ratio
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-140028DOI: 10.1109/SPAWC.2013.6612135ISI: 000333366400136ScopusID: 2-s2.0-84885832262ISBN: 978-1-4673-5577-3OAI: oai:DiVA.org:kth-140028DiVA: diva2:689685
2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2013, 16 June 2013 through 19 June 2013, Darmstadt
QC 201401212014-01-212014-01-162014-04-24Bibliographically approved