Geospatially-Aware Access Control for Distributed Spatial Database Based on View Mechanism

With the growing need of integration and sharing of spatial data located in different places on the network, distributed spatial database technology has become a hot research field. Meanwhile, spatial information security, especially access control, has attracted more and more attention in practice. Access control for distributed spatial databases has two challenges: realization of fine-grained and spatially aware access control, check access requests against authorization information and make access decision. The general methods to meet these challenges are fairly complicated and difficult to accomplish. Therefore, we propose using views to implement access control functionality for distributed spatial database, whose P2P architecture is firstly described. Then we discuss the definition and authorization of distributed views and their management. Finally, we put forward the reference framework and explain the control procedure.