id: 06067654
dt: a
an: 06067654
au: Zhang, Yingjun; Zhang, Yang; Chen, Kai
ti: A map-layer-based access control model.
so: Jung, Souhwan (ed.) et al., Information security applications. 12th
    international workshop, WISA 2011, Jeju Island, Korea, August 22‒24,
    2011. Revised selected papers. Berlin: Springer (ISBN
    978-3-642-27889-1/pbk). Lecture Notes in Computer Science 7115, 157-170
    (2012).
py: 2012
pu: Berlin: Springer
la: EN
cc: 
ut: access control model; spatial database systems; policy conflict;
    authorization evaluation
ci: 
li: doi:10.1007/978-3-642-27890-7_14
ab: Summary: Access control is very important for database management systems.
    Although several access control models have been proposed for
    geographical maps, most of them are based on the concept of
    authorization window. If there are many complex authorizations, we have
    to define many windows and the processing of evaluation will be
    time-consuming. This paper presents a new access control model, which
    supports authorization on map layers. This model also supports both
    positive and negative authorizations, time constraint and so on. In
    order to compose a role’s authorizations in several layers,
    Multicolor Combination Theory is defined here. Then we can overlay the
    authorization layers to map layers in authorization evaluation, which
    is more efficient. At last some propagation rules are defined to makes
    authorization simpler and more flexible.
rv: