Indexing the positions of continuously moving objects
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
Quadtree and R-tree indexes in oracle spatial: a comparison using GIS data
Proceedings of the 2002 ACM SIGMOD international conference on Management of data
R-trees: a dynamic index structure for spatial searching
SIGMOD '84 Proceedings of the 1984 ACM SIGMOD international conference on Management of data
Protecting Privacy from Continuous High-resolution Satellite Surveillance
Proceedings of the IFIP TC11/ WG11.3 Fourteenth Annual Working Conference on Database Security: Data and Application Security, Development and Directions
Spatio-Temporal Indexing for Large Multimedia Applications
ICMCS '96 Proceedings of the 1996 International Conference on Multimedia Computing and Systems
A Generalized Temporal Role-Based Access Control Model
IEEE Transactions on Knowledge and Data Engineering
An Authorization Model for Geospatial Data
IEEE Transactions on Dependable and Secure Computing
Proceedings of the tenth ACM symposium on Access control models and technologies
GEO-RBAC: a spatially aware RBAC
Proceedings of the tenth ACM symposium on Access control models and technologies
Supporting location-based conditions in access control policies
ASIACCS '06 Proceedings of the 2006 ACM Symposium on Information, computer and communications security
Reasoning with semantics-aware access control policies for geospatial web services
Proceedings of the 3rd ACM workshop on Secure web services
A geotemporal role-based authorisation system
International Journal of Information and Computer Security
Efficient enforcement of security policies based on tracking of mobile users
DBSEC'06 Proceedings of the 20th IFIP WG 11.3 working conference on Data and Applications Security
Towards privacy-enhanced authorization policies and languages
DBSec'05 Proceedings of the 19th annual IFIP WG 11.3 working conference on Data and Applications Security
Unified index for mobile object data and authorizations
ESORICS'05 Proceedings of the 10th European conference on Research in Computer Security
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Uncontrolled dissemination of geospatial data may have grave implications on national security and personal privacy. Geospatial data can be considered sensitive based on attributes such as the location, resolution and the time of capture, etc. As such, authorisations associated with this data also possess spatial and temporal attributes. The main contribution of this paper is to improve the response time of access requests, by proposing a unified index structure called *-tree that is capable of indexing both spatiotemporal objects and authorisations in a single index structure. *-tree is an extension of R-tree that indexes objects based on their resolutions as well as on their spatial and temporal attributes and overlays spatiotemporal authorisations on the nodes of the tree. We show how the *-tree can be constructed and maintained, provide algorithms to process access requests and present performance evaluation results that demonstrate a significant improvement in performance.