On Secrecy above Secrecy Capacity

Details On Secrecy above Secrecy Capacity On Secrecy above Secrecy Capacity

2012-03-12

arxiv.org/abs/1203.2456v2

Computer Science

Information Theory

4 Pages, 2 Figures, Submitted to SPCOM 2012

Scientific paper

In this paper we provide schemes that achieve rates above the 'secrecy capacity' region on a Gaussian wire-tap channel. We take the probability of error as the measure of reliability at the intended receiver and also as the measure of secrecy at the eavesdropper. We show that any rate 0< R < C = 0.5log(1 +P/N) is achievable for this case using the usual random coding-decoding scheme. We also show the relation between probability of error and equivocation as considered in physical layer secrecy problems. We then extend the results to the fading channels.

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