Recently P2P computing has attracted lots of attention from both the distributed computing community and millions and millions of Internet users. This paper describes a pure P2P file sharing system, QuickPeer, which is originally designed to satisfy the requirement for a graduate computer science course. Our QuickPeer system is not only a P2P application, but also a software framework for distr...

The heavyweights of the media industry have become aware of the proliferation of mass piracy on the internet via peer-to-peer file sharing technologies. Attempts to stop the piracy by legal action against the creators of the technology have only prompted the creation of smarter, decentralised file sharing systems. Including copyright protection systems on CD’s/DVD’s have only lead to developmen...

Networks utilizing modern communication technologies can offer competitive advantages to those using them wisely. But due to the existence of network effects, planning and operating cooperation networks is difficult. In this paper, the strategic situation of individual agents deciding on network participation is analysed. A systematic equilibrium analysis using computer-based simulations reveal...

Because files are typically stored as sequences of data blocks, the file carving process in digital forensics involves the identification and collocation of the original blocks of files. Current file carving techniques that use the signatures of file headers and footers could be improved by first classifying each data block in the storage media as belonging to a given file type. Unfortunately, ...

The utility of Peer-to-Peer (P2P) systems extends far beyond traditional file sharing. This paper provides an overview of how P2P systems are capable of providing robust command and control for Distributed Multi-Agent Systems (DMASs). Specifically, this article presents the evolution of P2P architectures to date by discussing supporting technologies and applicability of each generation of P2P s...

Inadvertent disclosure of sensitive business information represents one the largest classes of recent security breaches. We examine a specific instance of this problem – inadvertent disclosures through peer-to-peer file sharing networks. We characterize the extent of the security problem for a group of large financial institutions using a direct analysis of leaked documents. We also characteriz...

Peer to peer systems have become a popular area of distributed systems research over the past few years, reflecting both the widespread use of systems like BitTorrent [5] and the emerging commercial potential of peer to peer systems for a variety of applications well beyond file sharing [4, 14, 20, 21, 22]. This line of research has resulted in substantial progress in understanding system behav...

We propose two types of autonomic and distributed cooperative behaviors of peers for peer-to-peer (P2P) file-sharing networks. Cooperative behaviors of peers are mediated by query trails, and allows the exploration of better trade-off points between file search and storage load balancing performance. Query trails represent previous successful search paths and indicate which peers contributed to...

Content pollution is one of the most common attacks against peer-to-peer file-sharing systems. As such, systems are usually open to users, and the deployed security mechanisms merely examine the sanity of the downloaded files—content pollution attacks can be easily launched. InfoRanking is a mechanism that tries to mitigate this security risk by ranking content items. In this paper, we show thr...

BitTorrent is currently one of the most popular peer-to-peer file sharing applications. Many previous studies of BitTorrent performance have focused on the dynamics of BitTorrent swarms and model flashcrowds by means of the arrival and departure processes of peers. However, until now there is no study that investigates the flashcrowd phenomenon at the BitTorrent system level. In this paper, we ...