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A sort of file access control system based on trusted computing platform has been presented in this paper. Firstly, it can not only control the user access, but also the access process, which can effectively protect the secret documents. Secondly, it can store the secret files on disk in the form of cipher text transparently, which does not affect the users' operation habits. During the internal processing,...
The research work of basic role-based access control RBAC is greatly emphasized in recent years. However, many of present works have nothing to do with the time character. After detail analysis about the RBAC 2004 model, a new RBAC model with multi-granularity time character called MG-TRBAC is proposed. In our new access control model, user, object, permission and roles are all temporal sensitive...
The user-role and role-permission mappings are two of the most important process of the access control. Most of the present access control model lack of considering the time constraints. This paper presents a novel access control model with fine-grained time-constrains expressed by OCL (Object Constraints Language). First, we define several terms such as time points and time span which have flexible...
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