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Distributed GIS system's data security, especially access control, has become an indispensable function component in the practical application of distributed system. However, current approaches to access control are mostly based on individual user identity; hence they do not scale to distributed systems. In this paper, a new access control mechanism which is the combination of trust and role-based...
Existing access control models which are designed to preserve integrity are inadequate for distributed system. In this paper, we propose a trust aware access control model called TAAC, which extends the existing access control models with trust level. Moreover, it assigns trust level to each subject and object, and can dynamically adjust it. We partly implement TAAC model based on attestation.
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