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Community-based Document Sharing System

Posted on:2006-05-24Degree:MasterType:Thesis
Country:ChinaCandidate:J DuFull Text:PDF
GTID:2178360185496935Subject:Computer application technology
Abstract/Summary:PDF Full Text Request
With the development of network, Instant Messenger is more and more popular. IM is a new application mode, which named internet-based decentralized cooperative work: the users in the edge of internet cooperate effectively and simply through the virtual space. And document sharing is one of the most important cooperation in this mode.GRID tries to enable the efficient resource sharing in the decentralized environment, and its virtual organization want to make a virtual space for the users to sharing their resource, but there is no correlative research for document sharing in decentralized cooperative work; CSCW is too complicated to use in decentralized cooperation. On count of access control, existing access control model is not very good for document sharing in decentralized cooperation. So, in this dissertation, community-based document sharing (CBDS) mode is proposed.In CBDS, community and transaction are defined, and it takes community as the virtual space of the user, transaction as the simple cooperation and document sharing as cooperation. CBDS has three kind of document sharing mode according to cooperation among the users, which are inner-transaction sharing, between-transaction sharing and role sharing.Access control in CBDS (CDSAC) is the focus in this dissertation. CDSAC implements authorization and control of the transaction and define the inheritance between transactions to ease the authorization operation of the users. In CDSAC, administrator define the constrain and inheritance in the community while users define the fine authorization of the document, which ensure the security in the whole community and make the user can control his/her document by himself/herself.In the end of the dissertation, implement of the prototype of the system is given, which show CBSC is very well for document sharing in decentralized cooperative work and its provide the convenient cooperation for users.
Keywords/Search Tags:decentralized cooperative work, community, transaction, document sharing, access control
PDF Full Text Request
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