Fundamental Limits on A Class of Secure Asymmetric Multilevel Diversity Coding Systems

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

5 Scopus Citations
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Author(s)

  • Congduan Li
  • Xuan Guang
  • Chee Wei Tan
  • Raymond W. Yeung

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)737-747
Journal / PublicationIEEE Journal on Selected Areas in Communications
Volume36
Issue number4
Online published11 Apr 2018
Publication statusPublished - Apr 2018

Abstract

In future communication applications, users may obtain their messages that have different importance levels distributively from several available sources, such as distributed storage or even devices belonging to other users. This scenario is best modeled by the multilevel diversity coding systems (MDCS). To achieve perfect (information-theoretic) secrecy against wiretap channels, this paper investigates the fundamental limits on the secure rate region of the asymmetric multilevel diversity coding systems (AMDCS), which include the symmetric case as a special case. Threshold perfect secrecy is added to the AMDCS model. The eavesdropper may have access to any one but not more than one subset of the channels but know nothing about the sources, as long as the size of the subset is not above the security level. The question of whether superposition (source separation) coding is optimal for such an AMDCS with threshold perfect secrecy is answered. A class of secure AMDCS (S-AMDCS) with an arbitrary number of encoders is solved and it is shown that linear codes are optimal for this class of instances. However, in contrast with the secure symmetric multilevel diversity coding systems (S-SMDCS), superposition is shown to be not optimal for S-AMDCS in general. In addition, necessary conditions on the existence of a secrecy key are determined as a design guideline.

Research Area(s)

  • asymmetric, Communication networks, Decoding, Image resolution, Linear codes, Multilevel diversity coding, secrecy, Security, Streaming media, superposition, symmetric, wiretap channel

Citation Format(s)

Fundamental Limits on A Class of Secure Asymmetric Multilevel Diversity Coding Systems. / Li, Congduan; Guang, Xuan; Tan, Chee Wei; Yeung, Raymond W.

In: IEEE Journal on Selected Areas in Communications, Vol. 36, No. 4, 04.2018, p. 737-747.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review