Invisible flow watermarks for channels with dependent substitution and deletion errors

Xun Gong, Mavis Rodrigues, Negar Kiyavash

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Flow watermarking is an efficient technique for linking packet flows that helps thwart various attacks in networks such as over the Internet. Current state-of-the-art water-marking schemes withstand packet losses at the expense of compromising invisibility. We present an invisible flow watermarking scheme that can endure large numbers of packet losses. To maintain invisibility, our scheme embeds quantization-index modulation watermarks into inter-packet delays (as opposed to intervals). As the watermark is injected within individual packets, packet losses may lead to water-mark desynchronization and substitution errors. To deal with this issue we propose a maximum likelihood decoding (ML) scheme based on a hidden-Markov model (HMM) of the channel. Experimental results demonstrate that our scheme is robust to both network jitters and packet deletions while remaining invisible to an attacker.

Original languageEnglish (US)
Title of host publication2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012 - Proceedings
Pages1773-1776
Number of pages4
DOIs
StatePublished - Oct 23 2012
Event2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012 - Kyoto, Japan
Duration: Mar 25 2012Mar 30 2012

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
ISSN (Print)1520-6149

Other

Other2012 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2012
CountryJapan
CityKyoto
Period3/25/123/30/12

Keywords

  • deletion channels
  • hidden-Markov models
  • network flow watermarking

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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