There is an increased interest, by content creators and owners, in content protection systems that provide the ability to control or restrict the content that can be shared on peer-to-peer file sharing systems. Some content protection systems have been proposed for centralized peer-to-peer systems (such as Napster) where a central authority controls all indexing and querying. These systems cann...

Music sharing technologies appear to exist tenuously between the possibilities supported by technical innovation (e.g., peer-to-peer discovery protocols) and the constraints of political, legal, and ethical considerations. These political, legal, and ethical considerations – digital rights management laws, in particular – have catalyzed much of the recent changes in music sharing technologies a...

In a handful of years only, Peer-to-Peer (P2P) systems have become an integral part of the Internet. After a few key successes related to music-sharing (e.g., Napster or Gnutella), they rapidly developed and are nowadays firmly established in various contexts, ranging from large-scale content distribution (BitTorrent) to Internet telephony(Skype) or networking platforms (JXTA). The main idea be...

Since the release of Napster in 1999, peer-to-peer file-sharing has enjoyed a dramatic rise in popularity. A 2000 study by Plonka on the University of Wisconsin campus network found that file-sharing accounted for a comparable volume of traffic to web applications, while a 2002 study by Saroiu et al. on the University of Washington campus network found that file-sharing accounted for more than ...

P2P computing has been employing in more and more application domains as the technology becomes mature. One popular and successful application area is file sharing. However, current file sharing systems support only or mainly keybased exact matching (e.g., Chord [27], CAN [25]) and keyword-based searching (e.g., Napster, Gnutella) for files discovery and location, which is not enough to meet th...

Peer-to-Peer networks have evolved from simple approaches like Napster (using a central index) and Gnutella (using simple broadcasting of queries) to more sophisticated approaches using distributed indices like DHTs [7], [9] or super peer networks [10]. These systems which allow to describe content with metadata assume homogeneous content/metadata; metadata schemas are fixed in advance for all ...

Peer-to-peer (P2P) networks have emerged over the past several years as new and effective ways for distributed resources to communicate and cooperate. "Peer-to-peer computing is the sharing of computer resources and services by direct exchange between systems. These resources and services include the exchange of information, processing cycles, cache storage, and disk storage for files." P2P net...

Measurement studies indicate a high rate of node dynamics in p2p systems. In this paper, we address the question of how high a rate of node dynamics can be supported by structured p2p networks. We confine our study to the hypercube routing scheme used by several structured p2p systems. To improve system robustness and facilitate failure recovery, we introduce the property of K-consistency, K ≥ ...

We consider the problem of increasing the availability of shared data in peer-to-peer (P2P) systems so that users can access any content, regardless of the current subset of online peers. In particular, we seek to conservatively estimate the amount of excess storage required to achieve a practical availability of 99.9% by studying a decentralized algorithm that only depends on a modest amount o...

RDF-based P2P networks have a number of advantages compared to simpler P2P networks such as Napster, Gnutella or to approaches based on distributed indices on binary keys such as CAN and CHORD. RDF-based P2P networks allow complex and extendable descriptions of resources instead of fixed and limited ones, and they provide complex query facilities against these metadata instead of simple keyword...