| ¡¡ | Chinese Journal of Computers Full Text |
| Title | The Resource Access Mechanism in Grid Based on Fuzzy-Trust |
| Authors | CHEN Jian-Gang1) WANG Ru-Chuan1),2) ZHANG Lin1) WANG Hai-Yan1) |
| Address | 1)(Institute of Computer Science, Nanjing University of Post and Telecommunications, Nanjing 210003) 2)(State Key Laboratory for Novel Software Technology, Nanjing University, Nanjing 210093) |
| Year | 2009 |
| Issue | No.8(1676¡ª1682) |
| Abstract & Background | Abstract This paper analyses the question about trust management during the access to grid resources. Through introduction of trust relation among the entities of the intra-domain and inter-domain, the subjective property of trust relation considered, the trust mechanism of resource access in the grid computing based on the fuzzy set is proposed, that is, the user for resource access builds the recommendation trust links and computes the synthetical trust relation based on the synthesis rules of the fuzzy arithmetic operators and through comparing with the trust policy of the user to decide whether to use the resource. At last, the paper gives the grid trust model. Keywords grid computing; fuzzy set; trust relation; management domain Background This paper is one of the research results of the projects funded by National Natural Science Foundation of China and the National High Technology Research and Development Program (863 Program) and other foundations. These projects are directed towards providing a secure middleware platform based on mobile agent technology in open network environment, e.g. grid computing system and Peer-to-Peer system, in order to avoiding the attack of malicious nodes. Now the research team has realized a prototype system of grid security key technology with java programming language, such as authentication, single sign on, trust, access control, authorization, etc. Security has been the focus of grid systems recently. As a kind of tool, GSI (Grid Security Infrastructure) provides the authentication and authorization services and so on. These mechanisms mostly belong to the objective factors, which have not met the needs of security. As the subjective factor, trust model plays an important role in security field. This paper mainly talks about how to apply the fuzzy set theory to build the trust mechanism in grid environment for enhancing security ability of system. Now researches usually focus their research on the trust modeling, the quantitative measurement mechanism, type definition, the establishment of initial trust values, trust storage, trust transitivity, trust synthesizing, trust renewal etc. Among these, the studies of trust model are still not enough. The dynamic and unpredictable grid environment makes it hard for nodes to collaborate in security. To solve this problem, the authors propose a subjective trust model of grid system based on fuzzy set theory. Through introduction of trust relation among the entities of the intra-domain and inter-domain, the subjective property of trust relation considered, the trust mechanism of resource access in the grid computing based the fuzzy set is proposed, that is, the user for resource access builds the recommendation trust links and computes the synthetical trust relation based on the synthesis rules of the fuzzy arithmetic operators and through comparing with the trust policy of the user to decide whether to use the resource. Thus the grid trust model is given. |