This Master thesis is a contribution to develope Multimedia security mechanisms for various P2P file sharing environments. Objective of this research thesis is to design a software tool for Multimedia business environments to fight against the copyright infringement in various P2P file sharing networks. In order to fulfil this objective, a combined implementation of two independent mechanisms d...

In order to solve “free rider” and “tragedy of the commons” problems in Peer-to-Peer(P2P) file sharing networks, this paper proposes a novel incentive mechanism based on debt theory and use game theory to analyze its efficiency. While trying to maximize its own utility subjected to individual rationality, every peer allocates bandwidth resources efficiently according to its debt relationships w...

This paper proposes a stochastic fluid flow model to compute the transfer time distribution of resources in peer-to-peer file sharing applications. The amount of bytes transferred among peers is represented by a continuous quantity (the fluid level) whose flow rate is modulated by a set of discrete states representing the concurrent upload and download operations on the peers participating to t...

The flourish of P2P systems draws a lot of attention of networking researchers. Some research efforts focus on P2P systems, trying to understand the mechanism of various implementations and the behavior pattern of P2P users, and then improve the systems’ performance. Others look at the issue from the angle of ISPs, trying to help ISPs solve various issues brought by P2P applications. In this ar...

Recent measurement studies have shown that traffic generated by peer-to-peer (P2P) file sharing applications has started to dominate the bandwidth consumption on Internet access links. The prevailing use of P2P applications carries with it significant implications for Internet Service Providers (ISPs): on the one hand increased levels of P2P traffic result in additional costs for an ISP, which ...

In this paper we propose an analytical model for file diffusion in a peer-to-peer (P2P) file-sharing network based on biological epidemics. During the downloading process, the peer shares the downloaded parts of the file and, thus, contributes to distributing it in the network. This behavior is similar to the spreading of epidemic diseases which is a well researched subject in mathematical biol...

This study researches behavior associated with online file sharing activities. Specifically, a technology known as ‘Bittorrent’ is studied in an auto-observational technique and supported by information gained through forums and blogs to gain insight. The main research question the authors ask is: what are the factors and processes that facilitate an individual’s participation in online sharing...

The transfer of scientific data has emerged as a significant challenge, as datasets continue to grow in size and demand for open access sharing increases. Current methods for file transfer do not scale well for large files and can cause long transfer times. In this study we present BioTorrents, a website that allows open access sharing of scientific data and uses the popular BitTorrent peer-to-...

This paper is concerned with gifting: giving not motivated by a direct, immediate, or obvious benefit. We analyze a popular technology used for gifting: the BitTorrent file-sharing system. We determine features associated with high levels of gifting and suggest changes to the protocol and to the design of associated BitTorrent Web sites to promote it. We then extend our conclusions and suggesti...