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Based on role-based access control, the conception of Hierarchical role is proposed. For the dynamics of Cloud computing environment, we divided the trusted level of the users and updated the trusted value of the users in real time. Then we allocated the corresponding role according to the trusted value. In the traditional access control model, system's security control strength was fixed. Once the...
Trust quantification is an important issue of dynamic trust management. Trust is fuzzy and dynamic, if exact math tools are used to calculate trust, there is information missing in the calculation. In this paper, we use fuzzy comprehensive evaluation method to quantify trust and propose a trust quantification algorithm. Simulation results show that the trust quantification algorithm can effectively...
Privacy is one of the most important issues in providing high-quality ubiquitous network services to users over the Internet. Although several privacy aware access control models have been proposed in recent years, these models still rely mostly on the traditional access control models designed primarily for security. When privacy becomes a main concern, these models are no longer adequate. In this...
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