P2P networks and the computations that they enable hold great potential in designing the next generation of very-large scale distributed applications. However, the P2P phenomenon has largely left untouched large organizations and business which have stringent security requirements and are uncomfortable with the anonymity, lack of centralized control and censorship, which are the norm in P2P sys...

P2P systems similar to file sharing applications are being used vastly due to unrestricted nature of these systems. Their unrestricting comes from their ability to cooperate and aggregate peer’s resources and their scalability. On the other side, today technologies are traditional client-server applications. These applications can perform strongly but they are not scalable due to limitations on...

Peer-to-peer (P2P) Data-sharing systems now generate a significant portion of Internet traffic. P2P systems have emerged as an accepted way to share enormous volumes of data. Needs for widely distributed information systems supporting virtual organizations have given rise to a new category of P2P systems called schema-based. In such systems each peer is a database management system in itself, e...

P2P systems, which are composed of unknown agents, have many problems in data sharing and creating. The main problem is concerned with the absence of the proper incentive mechanism for cooperating and feeding the systems. If the participants of P2P systems are not supported by proper incentives for data sharing and creating, the systems will starve from resources through extinction of sharers a...

The dynamics of peer participation, or churn, are an inherent property of Peer-to-Peer (P2P) systems that should be incorporated in both the design and evaluation of P2P systems. This requires a proper characterization of churn in real-world P2P networks. However, the few previous measurement-based studies on the characterization of P2P systems have used either unrepresentative group of peers o...

Ensuring content persistence with minimal replication overhead is a prerequisite for providing any consistent service over a peer-to-peer (P2P) overlay. This paper introduces S-DATA, a bandwidth efficient protocol for achieving highly available P2P systems with minimal replication overhead. When considering a global P2P system, the cyclic behavior of peers situated at different time zones can b...

Peer-to-Peer systems have become, in a short period of time, one of the fastest growing and most popular applications. The decentralized and distributed nature of p2p systems leads to living aside the client-server model. In p2p model each node takes both the roles of client and server. As a client, it can query and download its wanted data files from other nodes and as a server, it can provide...