Problem statement: In the recent years, peer to peer networks have rapidly developed in the distributed and decentralized world of internet. Current research indicated that P2P applications were responsible for a substantial part of Internet traffic. Number of users embracing new P2P technology is also increasing fast. It is therefore important to understand the impact of the new P2P services o...

The economic analysis of property rights proceeds in two steps. The Ž rst distinguishes rival from nonrival goods. The second contrasts the welfare effects of property rights for these two types of goods. For rival goods, strong property rights lead to efŽ cient outcomes. For nonrival goods, property rights involve the trade-off formalized by William Nordhaus (1969): Weak property rights lead t...

1 G. Portokalidis is also with Leiden University 2 E.P. Markatos and M. Marazakis are also with the University of Crete. Abstract—Peer-to-peer file sharing systems have become increasingly popular over the last few years, by attracting large numbers of Internet users, who share a continuously increasing volume of data. Since the launch of Napster, the first widely known peer-to-peer file sharin...

The use of peer-to-peer systems for sharing information, files and other resources has risen dramatically over the last three years. File sharing is the ‘killer app’ that has driven this explosion in popularity. The first generation of peer-to-peer file sharing systems, including Napster, Morpheus and Kazaa, followed the traditional client-server paradigm. However, concerns over the legality an...

A system’s dependability can be thought of as being the trustworthiness of the system. The difficulty when attempting to measure dependability is that it is typically a context sensitive property. While one user might regard a system to be dependable for the particular activities they use it for, another user might regard it to be totally undependable for their activities. As well as being cont...

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The field of mobile Peer-to-Peer networks (MP2P) has various forms and currently there exists no coherent view on what is understood by it. The term mobile emphasizes that nodes/peers in the network are mobile, and therefore need to be equipped with some kind of wireless communication technology. Examples of nodes include pedestrians with mobile devices [284] or vehicles with wireless communica...

The success of a P2P file-sharing network highly depends on the scalability and versatility of its search mechanism. Two particularly desirable search features are scope (ability to find infrequent items) and support for partial-match queries (queries that contain typos or include a subset of keywords). While centralized-index architectures (such as Napster) can support both these features, exi...

Dynamic filtering of IP traffic based on contents of packet payloads provides a means for monitoring and controlling a number of Internet services which prove difficult to manage by traditional means. Constituents of the portion of Internet traffic not attributable to traditional services can be identified and quantified, even if applications transfer data on a highly dynamic range of ports. An...

Peer-to-peer applications (P2P) are no longer limited to home users, and start being accepted in academic and corporate environments. While file sharing and instant messaging applications are the most traditional examples, they are no longer the only ones benefiting from the potential advantages of P2P networks. For example, network file storage, data transmission, distributed computing, and co...