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Information Leak in the Chord Lookup Protocol

By Charles W. O’donnell and Vinod Vaikuntanathan

Abstract

In Peer-to-peer (P2P) systems, it is often essential that connected systems (nodes) relay messages which did not originate locally, on to the greater network. As a result, an intermediate node might be able to determine a large amount of information about the system, such as the querying tendencies of other nodes. This represents an inherent security issue in P2P networks. Therefore, we ask the following question: Through the observation of the network traffic in a P2P network, what kind of information can an adversarial node learn about another node in the same network? In this paper, we study this question in the case of a specific P2P system- Chord [10]. We also study the effects of the parameters of Chord (such as finger-table size) and the various enhancements to Chord (such as location caching and data caching) on the amount of information leaked. 1

Publisher: IEEE Computer Society Press
Year: 2004
OAI identifier: oai:CiteSeerX.psu:10.1.1.135.7465
Provided by: CiteSeerX
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