An ad hoc network is a collection of nodes that do not need to rely on a predefined infrastructure to keep the network connected. Nodes communicate amongst each other using wireless radios and operate by following a peer-to-peer network model. In this article we propose a multifold node authentication approach for protecting mobile ad hoc networks. The security requirements for protecting data ...

Composition of Web services enables collaboration among autonomous business organisations such that they can integrate their services to perform collaborative business activities. It facilitates the development of new services using pre-existing Web services thus reducing development and operational costs. However, the highly distributed, dynamic, and autonomous nature of component Web services...

In a hybrid peer-to-peer (P2P) system, some operations are intentionally centralized, such as indexing of peers’ files. We present several protocols to achieve mutual communication anonymity between an information requester and a provider in a hybrid P2P information-sharing environment with trusted index servers such that neither the requester, nor the provider can identify each other, and no o...

Public Key Infrastructure (PKI) is well recognized as the only possible complete solution for network security problem nowadays, and Peerto-Peer (P2P) has also been viewed as one of the most potential network technology today. The design of CERNET (China Education and Research Network) PKI, which make the best of P2P technology to implement certification revocation information distribution, was...

Searching efficiency is a decisive factor concerning scalability in large-scale peer-to-peer (P2P) file sharing systems. While flooding is the most commonly used and user-performance oriented method to broadcast query across an unstructured P2P network, it generates a large number of redundant messages. Our study shows that more than 70% of messages are redundant using flooding in a moderately ...

For a P2P network, the contents distribution is a very important service because the contents provider is not fixed. And media streaming and file saving operations should be simultaneously carried out in order to distribute contents through the P2P network. In this paper, a P2P multi-source media streaming system which can replay the contents data during downloading is proposed and implemented....

State-of-the-art P2P IR systems suffer from their lack of response time guarantees, especially with scale. To address this issue, a number of techniques for caching of multi-term inverted list intersections and query results have been proposed recently. Although these enable speedy query evaluations with low network overhead, they fail to consider the potential impact of caching on result quali...

Blind flooding is a popular search mechanism used in current commercial P2P systems because of its simplicity. However, blind flooding among peers or superpeers causes large volume of unnecessary traffic although the response time is short. Some improved statistics-based search mechanisms can reduce the traffic volume but also significantly shrink the query coverage range. In some search mechan...

P2P content distribution networks have become extremely popular on the Internet. Due to their self-organization properties, they suffer from the lack of control to balance the load among peers for contents of different popularity. In this paper, we define and analyze a fully decentralized architecture to support replication of popular media content in a peer-to-peer network. We show that by exp...