DocumentCode :
637245
Title :
Secure key agreement over reciprocal fading channels in the low SNR regime
Author :
Andersson, Mats ; Khisti, Ashish ; Skoglund, Mikael
Author_Institution :
ACCESS Linnaeus Centre, R. Inst. of Technol. (KTH), Stockholm, Sweden
fYear :
2013
fDate :
16-19 June 2013
Firstpage :
674
Lastpage :
678
Abstract :
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.
Keywords :
cryptography; fading channels; bursty communication; channel training; low SNR scaling; noncoherent secret key agreement capacity; pilot-only symbols; reciprocal block fading channel; secret message transmission; secure key agreement; signal-to-noise ratio; Communication system security; Conferences; Fading; Random variables; Signal to noise ratio; Training; Wireless communication;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing Advances in Wireless Communications (SPAWC), 2013 IEEE 14th Workshop on
Conference_Location :
Darmstadt
ISSN :
1948-3244
Type :
conf
DOI :
10.1109/SPAWC.2013.6612135
Filename :
6612135
Link To Document :
بازگشت