Loading [a11y]/accessibility-menu.js
Secret-key sharing based on layered broadcast coding over fading channels | IEEE Conference Publication | IEEE Xplore

Secret-key sharing based on layered broadcast coding over fading channels


Abstract:

A secret-key sharing strategy based on layered broadcast coding is introduced for slow fading channels. In the model considered, Alice wants to share a key with Bob while...Show More

Abstract:

A secret-key sharing strategy based on layered broadcast coding is introduced for slow fading channels. In the model considered, Alice wants to share a key with Bob while keeping the key secret from a passive eavesdropper, Eve. Both Alice-Bob and Alice-Eve channels are assumed to undergo slow fading, and perfect channel state information (CSI) is assumed to be known only at the receivers during the transmission. Layered coding facilitates adapting the reliably decoded rate at Bob to the actual channel state without CSI available at Alice. The index of a reliably decoded layer is sent back to Alice via a public and error-free channel, which is exploited by Alice and Bob to generate the secret key. In this paper, the secrecy key rate is derived. In addition, the optimal power distribution over coded layers is characterized. It is shown that layered coding can increase the secrecy key rate significantly compared with single-level coding.
Date of Conference: 28 June 2009 - 03 July 2009
Date Added to IEEE Xplore: 18 August 2009
ISBN Information:

ISSN Information:

Conference Location: Seoul, Korea (South)

References

References is not available for this document.