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Mobility changes anonymity: new passive threats in mobile ad hoc networks
Published Web Location
http://www3.interscience.wiley.com/cgi-bin/jissue/112596646Abstract
Privacy in mobile ad hoc networks has new semantics in addition to
the conventional notions for infrastructure networks. Mobility enabled by
wireless communication has significantly changed privacy issues and anonymity
research in many ways. In particular, mobility requires ad hoc routing schemes
to transmit messages frequently in an open wireless medium. The routing traffic
facilitates adversaries in conducting various attacks threatening the network
security and privacy. In this work, we focus on passive routing attacks. We
present an extensive study on new anonymity threats and classify the
corresponding security demands into three new categories: (1) venue anonymity;
(2) privacy of ad hoc network topology; and (3) privacy of motion pattern.
These new aspects are all introduced by mobility and left unaddressed in fixed
infrastructure. This leads us to investigate new design principles. Our study
suggests that on-demand routing, identity-free routing, and neighborhood
traffic mixing are better design choices to defend against the new anonymity
threats in mobile networks. The paper also demonstrates through examples on the
visualization of the mobile anonymity attacks and on the quantification of the
effectiveness of the attacks. Copyright (c) 2006 John Wiley & Sons,
Ltd.
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