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While the increasingly e-commerce provides enormous opportunities, it presents potential threats and risks because of lack of trust as well. Various trust management polices are proposed to improve these issues. However, most of these existing approaches only take into account a global attribute. The evaluation granularity is too coarse for customers to make an exact transaction decision. This paper...
Peer-to-Peer (P2P) systems receive growing acceptance, and the need of maintain the history information of nodes appears increasingly in a variety of P2P based applications. In this paper, we propose an algorithm to efficiently maintain the history information of all nodes in Chord like network under churn. In spirit to successor duplication, the duplications of load history are placed in its successors,...
In various types of peer-to-peer (P2P) applications, peers have to efficiently and flexibly make an agreement on one value which satisfies an agreement condition. In traditional agreement protocols, each peer sends one value to the other peers at each round. If each peer could not make an agreement on the values, the peer sends another value to the other peers at next round. Depending on the order...
As online interactions often occur among peers with no prior knowledge of each other in P2P systems, the problem of security is attracting more and more attention. Hence, how to construct an effective trust mechanism to help build trust among peers is an important issue for the research of P2P technology nowadays. This paper proposes a novel reputation-based trust evaluation mechanism for P2P systems...
Information retrieval has been the important problem of research in unstructured P2P systems. In order to improve the efficiency of the data retrieval, this paper proposed an algorithm for intelligent search based on skyline query technology. Combining the similarity of messages and the hit rate of nodes, a best set of neighbour nodes which was sent messages to was obtained by skyline query technology...
There are many discussions on agreement protocols of multiple peer processes (peers) where every peer just aims at agreeing on one value out of values shown by the peers. In meetings of human societies, agreement procedures are so flexible that persons can change their opinions and can use not only all-condition but also various types of agreement conditions like majority-condition. In this paper,...
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