Covert capacity of bosonic channels

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17 Scopus citations

Abstract

We investigate the quantum-secure covertcommunication capabilities of lossy thermal-noise bosonic channels, the quantum-mechanical model for many practical channels. We determine the expressions for the covert capacity of these channels: Lno-EA, when Alice and Bob share only a classical secret, and LEA, when they benefit from entanglement assistance. We find that entanglement assistance alters the fundamental scaling law for covert communication. Instead of Lno-EA √ n - rno-EA(n), rno-EA(n) = o( √ n), entanglement assistance allows LEA √ n log n - rEA(n), rEA(n) = o( √ n log n), covert bits to be transmitted reliably over n channel uses.

Original languageEnglish (US)
Article number3017199
Pages (from-to)555-567
Number of pages13
JournalIEEE Journal on Selected Areas in Information Theory
Volume1
Issue number2
DOIs
StatePublished - Aug 2020

Keywords

  • Channel capacity
  • Communication system security
  • Covert communication
  • Low probability of detection
  • Low probability of intercept
  • Quantum cryptography

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Media Technology
  • Artificial Intelligence
  • Applied Mathematics

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