12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Maximizing lifetime of event-unobservable wirel...
View graph of relations

« Back

Maximizing lifetime of event-unobservable wireless sensor networks

Research output: Contribution to journalJournal article

Published

Journal publication date06/2011
JournalComputer Standards and Interfaces
Journal number4
Volume33
Number of pages10
Pages401-410
Original languageEnglish

Abstract

In wireless sensor networks (WSNs) contextual information such as the information regarding whether, when, and where the data is collected cannot be protected using only traditional measures (e.g., encryption). Contextual information can be protected against global eavesdroppers by periodic packet transmission combined with dummy traffic filtering at proxy nodes. In this paper, through a Linear Programming (LP) framework, we analyze lifetime limits of WSNs preserving event-unobservability with different proxy assignment methodologies. We show that to maximize the network lifetime data flow should pass through multiple proxies that are organized as a general directed graph rather than as a tree.