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Decorrelating WSN Traffic Patterns with Maximally Uninformative Constrained Routing

  • Juan E. Tapiador
  • Mudhakar Srivatsa
  • John A. Clark
  • John A. McDermid
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6827)

Abstract

We study optimal strategies to decorrelating traffic in tactical wireless sensor networks where the goal is hiding sensible information (e.g., communication patterns, nodes location) about ongoing operations implicitly contained in network flows. Contrarily to existing approaches based on heuristic arguments, in this work we pose the problem in a more formal way. In particular, we explore the problem of how to derive routing policies which minimize the path predictability whilst observing certain QoS restrictions. We show how deriving optimal routing strategies can be couched as a nonlinear optimization problem with linear constraints. A convenient reformulation allows us to attack it very efficiently with a numerical least square error solver. Overall, the resulting scheme is an adaptive multipath routing protocol which provides the optimal balance between uninformativeness of routing patterns and end-to-end communication costs.

Keywords

Wireless sensor networks traffic analysis security-cost tradeoffs 

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Copyright information

© IFIP International Federation for Information Processing 2011

Authors and Affiliations

  • Juan E. Tapiador
    • 1
  • Mudhakar Srivatsa
    • 2
  • John A. Clark
    • 1
  • John A. McDermid
    • 1
  1. 1.Department of Computer ScienceUniversity of YorkYorkUK
  2. 2.IBM Thomas J. Watson Research CenterUSA

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