The Design And Implementation Of Content Manage Service System With Trust Evalution

Nowadays, the technology of P2P (Peer-to-Peer) network is a hot spot in the field of international computer network. It returns the domination of the network to the user and helps people to communicate with each other by the most directly and extensive way. The P2P technology makes full use of the resources of edge node. It increases the capacity and has a lot of advantages, such as flexibility and scalability. JXTA, an open P2P project by Sun Corp, begun at Apr.2001.Its target is to extract the general requirements from all P2P systems, so as to create common underneath protocols, which are used to normalize and standardize all kinds of P2P core, services and applications. JXTA provides a thin, universal, virtual platform with the basic functions necessary for a P2P network. Because of its universality, platform independence, interoperability, it has been the standards of the P2P application.The exchanges and sharing of files are the basic application of the P2P technology and the researching on it has never stopped. There are many applications of the file sharing, such as Napster, Gnutella, Freenet and so on. These applications are working in different P2P network structures and have developed for a long time. However, the safe information of sharing file that the user provides has not been involved. The result of this situation is: while the customer downloads the file, they can't predict the available and safe risks of the file.This paper analyzes the features of some software about exchange and sharing of files, studies the technology of the JXTA network platform, especially the framework, basic components and core protocols about it. With the help of the universal service in peer group, the author designs a CMS (Content Manage Service) system which has a trust evaluation in this platform. This paper lists the implementation code of some main functions. The system allows users to evaluate the safety and availability about the files at the time of using the traditional functions such as sharing, downloading. Users also can access other files information related to the evaluation of the trust. The system can ensure not only the availability of service, but also the usefulness of files. It helps the user of P2P obtain more informations of the file, and provides a new idea for network services and managing of sharing files in distributed P2P network structure.