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With the development of society, different kinds of examination appear constantly. The way of traditional examination has been unable to meet the needs of the developing education informationization. The role was divided into function modules by analyzing users' requirement. An online examination system based on Web was designed, which adopted B/S mode, used the IDEA as the coding tool, combined with...
In order to prevent illegal users access the cloud data frequently, this paper puts forward trusted access control model based on role-task in cloud computing. It can prevent the illegal users accessing cloud data more effectively. Combining the advantages of the role access control model and the task access control model, the concept of reputation value will be introduced, and a certain threshold...
With the Web Services widely used in the distributed systems, the demand for cross-domain authentication is increasing day by day, its security issues become more and more prominent. Aiming at disadvantages of the cross-domain authentication, this article presents a dynamic authentication mechanism crossing domains for Web Services based on SAML. It can achieve single sign-on and improve the interoperability...
The paper proposes a dynamic access control model for Web services that based on the trust-authorization -WS-TABAC model. A simple evaluation algorithm about trust is defined, which can calculate the trust degree of users easily. In WS-TABAC model, part or complete privileges can be achieved through the mapping relations defined between trust and authorization. Theoretical analysis and examples demonstrate...
E-learning is being increasingly viewed as an important activity in the field of distance and continuing education. Web-based courses offer obvious advantages for learners by making access to educational resources very fast, real-time and relevant, at any time or place. With the rapid development of network, the resources of e-learning systems get richer and richer. However, the rapid development...
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