File-sharing applications remain today the most representative and popular realization of the Peerto-Peer paradigm. Large objects receive an increasing amount of interest in such systems. In this paper, we identify several challenges related to sharing voluminous content such as movies, OS distributions, games, etc, in unstructured Peer-to-Peer networks. We then describe our scheme which adapti...

Peer-to-peer (P2P) services allow users to share networked resources, notably bandwidth and content, from the edges of the network. These services have been popularized because of file sharing — particularly the sharing of unlicensed copyrighted files. Concerns about such P2P file sharing were highlighted by content owners’ recent lawsuits against individual users and P2P network operators. How...

In this paper, we present the design of a credit-based trading mechanism for peer-to-peer file sharing networks. We divide files into verifiable pieces; every peer interested in a file requests these pieces individually from the peers it is connected to. Our goal is to build a mechanism that supports fair large scale distribution in which downloads are fast, with low startup latency. We build a...

In this paper we present a P2P file-sharing architecture optimized for mobile networks. We discuss the applicability of current P2P techniques for resource access and mediation in the context of 2.5G/3G mobile networks. We investigate a mobile P2P architecture that is able to reconcile the decentralized operation of P2P file sharing with the interests of network operators, e. g. control and per...

File sharing, typically involving video or audio material in which copyright may persist and using peer-to-peer (P2P) networks like BitTorrent, has been reported to make up the bulk of Internet traffic (Pouwelse et al., 2008; Kryczka et al., 2011). The free-riding problem appears in this “digital gift economy” but its users exhibit rational behaviour (Becker and Clement, 2006), subject to the c...

In this paper we present a P2P file-sharing architecture optimized for mobile networks. We discuss the applicability of current P2P resource access and mediation techniques in the context of 2.5G/3G mobile networks. We investigate a mobile P2P architecture that is able to reconcile the decentralized operation of P2P file sharing with the interests of network operators, e. g. traffic control. Th...

This paper provides a survey of searchable, peer-to-peer filesharing systems that offer the user some form of anonymity. We start this survey by giving a brief description of the most popular methods of providing anonymous communication. These include the Ants protocol, Onion routing, Multicasting, MIXes and UDP address spoofing. We then describe a number of implemented systems based on one, or...

Peer-to-peer file sharing applications have become enormously popular over the past few years, coming to represent a large fraction of wide-area Internet traffic. A side effect of this explosive growth has been an emerging tussle between users, who want fast downloads, and ISPs, whose flat-rate pricing business model is threatened by the extreme volume of P2P traffic. Because ISP costs scale wi...

Modern peer-to-peer file sharing systems rely heavily on the willingness of users to distribute files to others. A selfish user can choose to download a file and consume resources without uploading in return. This form of free-riding plagues all currently deployed peer-to-peer systems. We present a novel protocol for a BitTorrent-like system (i.e., one in which only one file is being shared) th...

Maze is a P2P file-sharing system with an active and large user base. It is developed, deployed and operated by an academic research team. As such, it offers ample opportunities to conduct experiments to understand user behavior. Embedded in Maze is a set of incentive policies designed to encourage sharing and contribution. This paper presents an in-depth analysis of the effectiveness of the in...