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Responder Anonymity and Anonymous Peer-to-Peer File Sharing

TitleResponder Anonymity and Anonymous Peer-to-Peer File Sharing
Publication TypeConference Paper
Year of Publication2001
AuthorsScarlata, V, Levine, BN, Shields, C
Conference NameNetwork Protocols, 2001. Ninth International Conference on
Date Published11-14 Nov. 2001
ISBN Number0-7695-1429-4
Keywordsanonymity, APFS, multicast

Data transfer over TCP/IP provides no privacy for network users. Previous research in anonymity has focused on the provision of initiator anonymity. We explore methods of adapting existing initiator-anonymous protocols to provide responder anonymity and mutual anonymity. We present Anonymous Peer-to-peer File Sharing (APFS) protocols, which provide mutual anonymity for peer-topeer le sharing. APFS addresses the problem of longlived Internet services that may outlive the degradation present in current anonymous protocols. One variant of APFS makes use of unicast communication, but requires a central coordinator to bootstrap the protocol. A second variant takes advantage of multicast routing to remove the need for any central coordination point. We compare the TCP performance of APFS protocol to existing overt le sharing systems such as Napster. In providing anonymity, APFS can double transfer times and requires that additional trac be carried by peers, but this overhead is constant with the size of the session. 1

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