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Service Di#erentiation in PeertoPeer Networks Utilizing Reputations

Summary: Service Di#erentiation in Peer­to­Peer Networks
Utilizing Reputations
Minaxi Gupta, Mostafa Ammar
College of Computing, Georgia Institute of Technology
Atlanta, GA, U.S.A.
{minaxi, ammar}@cc.gatech.edu
Abstract. As the population of P2P networks increases, service dif­
ferentiation issues become very important in distinguishing cooperating
peers from free­loaders. The basis for service di#erentiation could either
be economic or the fact that the peers di#er from each other in the type
of services and resources they contribute to the system. Taking the latter
approach, this paper makes three contributions: 1) it defines parameters
that are suitable for service di#erentiation in P2P networks, 2) it pro­
poses SDP, a protocol to accomplish service di#erentiation, and 3) it
identifies a set of features that are necessary in a reputation system that
measures the contributions of individual peers in the system.
1 Introduction
Many flavors of peer­to­peer (P2P) networks are in wide use today to access
a variety of content. The popularity of these networks can be judged from the
fact that Kazaa (www.kazaa.com) routinely supports of the order of two million


Source: Ammar, Mostafa - College of Computing, Georgia Institute of Technology


Collections: Computer Technologies and Information Sciences