A sequential distinguisher for covert channel identification

K. P. Subbalakshmi, Rajarathnam Chandramouli, Nagarajan Ranganathan

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Covert channels are of two types: (a) timing channel and (b) storage channel. Most previous works have studied these channels from the encoder's perspective, namely, information theoretic capacity, algorithms and protocols for hiding information etc. This paper investigates the covert channel problem from an passive adversary's perspective. A sequential distinguisher for storage channel identification by an adversary is proposed and its properties are derived analytically. The impact of correlation in the observations received by the adversary is studied analytically as well as numerically.

Original languageEnglish
Pages (from-to)274-282
Number of pages9
JournalInternational Journal of Network Security
Volume5
Issue number3
StatePublished - 2007

Keywords

  • Covert channel
  • Error probability
  • Hypothesis testing
  • Passive adversary
  • Random walk

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