P2P检索系统安全研究:基于聚类域的三层体系架构

Clustering Domain Based Three-Layer Architecture: A Novel Security Architecture for Information Retrieval System Based on P2P

对等计算作为学术界和工业界的关注焦点,其在实践中的重要应用是信息资源共享,但随之而来的是如何在P2P环境中进行资源查找,实现高效而安全的信息检索问题。该文在分析对等计算体系结构现状之后,提出P2P信息检索系统的新型安全体系架构——基于聚类域的三层体系结构。该结构通过资源描述框架(Resource Description Framework)的元数据描述,将资源节点进行聚类,进而组成聚类域(Clustering Domain),并以此为前提和基础构建从上而下依次为应用层、结构化层和非结构化层的三层体系结构。该结构最大限度地发挥出各层结构的高效、安全优点,并相应控制了局限性和不足。

As a hot spot in the computer research and industrial fields, peer-to-peer computing （Abbr. P2P） has been mainly applied to resource sharing. However the coming issues are how to find resource and how to retrieve information efficiently and securely in P2P systems. We have conducted an extensive study to the status of P2P architecture and proposed a novel architecture of P2P based information retrieval systems： clustering domain based three-layer architecture, which is made up of application layer, structured layer and unstructured layer. The foundation of the new architecture is clustering domain having the same metadata, which is formed by nodes clustering. The sharing information is described by metadata using RDF statements. The novel architecture has inherited the advantages of both structured and unstructured architecture while eliminated their respective disadvantages.