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Chord is a classical peer-to-peer document routing model. In this paper, we firstly present an improved Chord model, in which the nodes are organized into groups, to enhance the lookup efficiency and decrease the impact of dynamic environment. In addition, we propose a file storage strategy in the improved Chord model. With the strategy, shared file can be transmitted from multiple nodes simultaneously that could speed up the download, and at the same time the strategy can guarantee data security by means of introduction of a special metadata file.
Date of Conference: 05-08 Dec. 2005