Computer Science – Information Theory
Scientific paper
2011-01-10
Computer Science
Information Theory
Removed the section on writing on fading paper; improved the gap result from $(1/2)\log3$ bits to half a bit; added a section
Scientific paper
Recently there has been a lot of success in using the deterministic approach to provide approximate characterization of Gaussian network capacity. In this paper, we take a deterministic view and revisit the problem of wiretap channel with side information. A precise characterization of the secrecy capacity is obtained for a linear deterministic model, which naturally suggests a coding scheme which we show to achieve the secrecy capacity of the degraded Gaussian model (dubbed as "secret writing on dirty paper") to within half a bit.
El-Halabi Mustafa
Georghiades Costas
Liu Tie
Shamai Shlomo
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