Visible to the public Secret key generation in correlated multi-dimensional Gaussian channels

TitleSecret key generation in correlated multi-dimensional Gaussian channels
Publication TypeConference Paper
Year of Publication2014
AuthorsPasolini, G., Dardari, D.
Conference NameCommunications (ICC), 2014 IEEE International Conference on
Date PublishedJune
Keywordsanalytical framework, antenna arrays, asymptotic analysis, Communication system security, confidential communications, correlated multidimensional Gaussian channels, Covariance matrices, frequency domains, frequency-domain analysis, Gaussian channels, intrinsic secrecy content, multiple antenna eavesdroppers, public channel, public key cryptography, radio networks, secret key generation, security, Signal to noise ratio, signal-to-noise ratio, spatial correlation, spatial domains, telecommunication security, time domains, time selectivity, time-domain analysis, Time-frequency Analysis, wide-sense stationary wireless channels, wireless channel reciprocity, wireless channels, Wireless communication, wireless networks
Abstract

Wireless channel reciprocity can be successfully exploited as a common source of randomness for the generation of a secret key by two legitimate users willing to achieve confidential communications over a public channel. This paper presents an analytical framework to investigate the theoretical limits of secret-key generation when wireless multi-dimensional Gaussian channels are used as source of randomness. The intrinsic secrecy content of wide-sense stationary wireless channels in frequency, time and spatial domains is derived through asymptotic analysis as the number of observations in a given domain tends to infinity. Some significant case studies are presented where single and multiple antenna eavesdroppers are considered. In the numerical results, the role of signal-to-noise ratio, spatial correlation, frequency and time selectivity is investigated.

DOI10.1109/ICC.2014.6883645
Citation Key6883645