Author
A. Belussi, E.Bertino, B.Catania, M.L. Damiani, A.Nucita
Abstract
Access control is an important component of any database management system.
Several access control models have been proposed for conventional databases.
However, these models do not seem adequate for geographical databases, due
to the peculiarities of geographical data. Previous work on access control
models for geographical data mainly concerns raster maps
(images).
In this paper, we present a discretionary access control model for
geographical maps.
We assume that each map is composed of a set of features. Each feature is
represented in one or more maps by spatial objects, described by means
of different spatial properties: geometrical properties, describing the
shape, extension and location of the objects composing the map,
and topological properties, describing the
topological relationships existing among spatial objects.
The proposed access control model allows the security administrator to
define authorizations against map objects at a very fine
granularity level, taking into account the various spatial
representations and the object dimension. The model also supports both
positive and negative authorizations as well as different
propagation rules that make access control very flexible.
Affiliation
University of Verona, CERIAS and Purdue University, University of Genova, University of Milano
