Security for Wiretap Networks via Rank-Metric Codes

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Security for Wiretap Networks via Rank-Metric Codes
The problem of securing a network coding communication system against a wiretapper adversary is considered. The network implements linear network coding to deliver n packets from source to each receiver, and the wiretapper can eavesdrop on arbitrarily chosen links. A coding scheme is proposed that can achieve the maximum possible rate of k = n - packets that are information-theoretically secure from the adversary. A distinctive feature of our scheme is that it is universal: it can be applied on top of any communication network without requiring knowledge of or any modifications on the underlying network code. In fact, even a randomized network code can be used. Our approach is based on Rouayheb-Soljanin's formulation of a wiretap network as a generalization of the Ozarow-Wyner wiretap channel of type II. Essentially, the linear MDS code in OzarowWyner's coset coding scheme is replaced by a maximumrank-distance code over an extension of the field in which linear network codi...
Danilo Silva, Frank R. Kschischang
Added 09 Dec 2010
Updated 09 Dec 2010
Type Journal
Year 2008
Where CORR
Authors Danilo Silva, Frank R. Kschischang
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