Research And Realization Of Resource Dissemination Based On UCON And Credibility

In open network environment, with the rapid development of information technologies, network security problems become increasingly prominent. During the access and dissemination process of digital resource, such phenomenon as unlawful access and authority-exceeding has interrupted the secure spread of information. Therefore, how to strengthen the confidentiality and security of information to realize the effective authorization control for resource dissemination becomes a hot and difficult problem.Aiming at the authorization control in resource dissemination, this paper studies usage control model—UCON and researches the application of the concept of credibility based on fuzzy set theory in resource dissemination. Main points are as follows:Firstly, this paper applies UCON to resource dissemination area, realizing the application of authorizations, obligations and conditions in resource dissemination. Particularly, with the features of resource dissemination, authorizations are described in detail, giving rule definition, theorem proving and so on. UCON has process continuity and attribute mutability, which can be used to replace traditional access control models in resource dissemination, meeting the needs of dynamic and continuity in open network.Secondly, the concept of credibility is brought to the authorization of resource dissemination. This paper uses fuzzy comprehensive evaluation to evaluate subjects' credibility with different credibility value having different resource usage rights. This method can achieve authorization control conveniently and briefly, avoiding the complexity and inconvenience of traditional authorization methods based on digital certificates. This paper also combines credibility and usage control policy together, using three decision-making factors to evaluate subjects' credibility. This way makes credibility become the bridge of usage decision and authorization in resource dissemination.Thirdly, the resource dissemination model UCONCD based on UCON and credibility is proposed. Based on several new definitions in resource dissemination, this paper concretely describes three decision-making factors and gives the formal description of rules of model. This model makes authorization based on credibility and revokes rights based on three process decision factors, realizing the separation of authorization and revocation. On the one hand, it saves the open and dynamic advantages of usage control. On the other hand, it achieves more secure authorization mechanism. At last, the application of UCONCD model is given: online reading resource dissemination system.