tailieunhanh - Báo cáo hóa học: " Research Article Secret Sharing over Fast-Fading MIMO Wiretap Channels"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Secret Sharing over Fast-Fading MIMO Wiretap Channels | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 506973 17 pages doi 2009 506973 Research Article Secret Sharing over Fast-Fading MIMO Wiretap Channels Tan F. Wong 1 Matthieu Bloch 2 3 and John M. Shea1 1 Wireless Information Networking Group University of Florida Gainesvilles FL 32611-6130 USA 2 School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332 USA 3GT-CNRS UMI2958 2-3 rue Marconi 57070 Metz France Correspondence should be addressed to Tan F. Wong twong@ Received 1 December 2008 Revised 25 June 2009 Accepted 14 September 2009 Recommended by Shlomo Shamai Shitz Secret sharing over the fast-fading MIMO wiretap channel is considered. A source and a destination try to share secret information over a fast-fading MIMO channel in the presence of an eavesdropper who also makes channel observations that are different from but correlated to those made by the destination. An interactive authenticated public channel with unlimited capacity is available to the source and destination for the secret sharing process. This situation is a special case of the channel model with wiretapper considered by Ahlswede and Csiszar. An extension of their result to continuous channel alphabets is employed to evaluate the key capacity of the fast-fading MIMO wiretap channel. The effects of spatial dimensionality provided by the use of multiple antennas at the source destination and eavesdropper are then investigated. Copyright 2009 Tan F. Wong et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction The wiretap channel considered in the seminal paper 1 is the first example that demonstrates the possibility of secure communications at the physical layer. It is shown in 1 that a source can transmit a