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Web services are increasingly hosted on peer to peer networks, to facilitate resource sharing and cooperation. In these settings, each peer hosts a set of services which can be invoked by other peers of the network through a service query. In a pure peer to peer network, it might not be possible to maintain directory for publishing the services, rather, the peers need to search for the required service...
Resource discovery is critical to the usability and accessibility of grid computing systems. Distributed Hash Table (DHT) has been applied to grid systems as a distributed mechanism for providing scalable range-query and multi-attribute resource discovery. Multi-DHT-based approaches depend on multiple DHT networks with each network responsible for a single attribute. Single-DHT-based approaches keep...
Peer-to-Peer(P2P) botnets that use P2P networks for remote control of bots have become the root cause of many Internet attacks. Compared with current botnets, P2P botnets are harder to be hijacked and defended. In this paper, we presents two sybil attacks techniques, i.e., random sybil attack and d-choice sybil attack to mitigate P2P botnets based on analyzing the weakness of botnets. We quantitatively...
Many structured Peer-to-Peer-Systems (P2P) have been developed over the past years. However, most of them rely on hash-functions and thus put major restrictions on applications being implemented on top of them. In this paper we present a very detailed description of Papnet, a hash-free P2P overlay-network that supports range-queries and realizes an infinite alphanumeric address space that can be used...
The peer-to-peer (P2P) systems have many applications due to their virtues: high scalability and low cost. The systems using super-peers (SPs), which deal with all queries, instead of ordinary-peers (OPs), run more efficiently. So how to choose SPs from all peers is a key, but also a difficult problem because of the systems' heterogeneity and dynamic. In this paper a novel mechanism for the selection...
To deal with problems such as load imbalance, topology mismatch and network instability for P2P systems, propose the method of implementing the functions of message routing and service index maintenance on different layers. Design algorithms for building clusters and hierarchical overlay, and propose an analytic model of traffic load for evaluation. Simulation results indicate that compared with 2-layer...
Super-peer P2P systems strike a balance between searching efficiency in centralized P2P systems and the autonomy, load balancing and robustness provided by pure P2P systems. Super-peer is a node in the super-peer P2P system that maintains the central index for the information shared by a set of peers within the same cluster. The central index handles the searching request on behalf of the connecting...
Super-peer P2P systems strike a balance between searching efficiency in centralized P2P systems and the autonomy, load balancing and robustness provided by pure P2P systems. A super-peer is a node in a super-peer P2P system that maintains the central index for the information shared by a set of peers within the same cluster. The central index handles the searching request on behalf of the connecting...
This paper introduces a suitable way for indexing multimedia metadata on a structured peer-to-peer overlay network, with special care to the management of rights metadata expressed by MPEG-21. We have selected a suitable subset of MPEG-21 rights expression language elements to be indexed, in order to map governed contents into a flat space and allow insertion and retrieval of digital contents. Furthermore,...
This paper presents an application for locating resources, such as files or media streams, shared by users of a mobile network. The application is fully distributed without centralized components in the fixed network. The paper proposes a simple method to define groups using local information about each userpsilas social contacts. The groups are used in combination with user-defined policies to control...
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