Wiretap channels with random states non-causally available at the encoder

Ziv Goldfeld, Paul Cuff, Haim H. Permuter

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We study the state-dependent (SD) wiretap channel (WTC) with non-causal channel state information (CSI) at the encoder. This model subsumes all instances of CSI availability as special cases, and calls for an efficient utilization of the state sequence for both reliability and security purposes. A lower bound on the secrecy-capacity, that improves upon the previously best known result published by Prabhakaran et al., is derived based on a novel superposition coding scheme. Our achievability gives rise to the exact secrecy-capacity characterization of a class of SD-WTCs that decompose into a product of two WTCs, one independent of the state and the other depends only on the state. The results are derived under the strict semantic-security metric that requires negligible information leakage for all message distributions.

Original languageEnglish
Article number8894385
Pages (from-to)1497-1519
Number of pages23
JournalIEEE Transactions on Information Theory
Volume66
Issue number3
DOIs
StatePublished - 1 Mar 2020

Keywords

  • Channel state information
  • Gelfand-Pinsker channel
  • semantic-security
  • soft-covering lemma
  • state-dependent channel
  • superposition code
  • wiretap channel

ASJC Scopus subject areas

  • Information Systems
  • Computer Science Applications
  • Library and Information Sciences

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