22-11-2012, 02:37 PM
State of the Art in Databases Access Control
Abstract
Access control is the process of mediating every request to resources and data maintained by
a system and determining whether the request should be granted or denied. Traditional access
control models and languages result limiting for emerging scenarios, whose open and dynamic
nature requires the development of new ways of enforcing access control. Access control is then
evolving with the complex open environments that it supports, where the decision to grant an
access may depend on the properties (attributes) of the requester rather than her identity and
where the access control restrictions to be enforced may come from di
erent authorities. These
issues pose several new challenges to the design and implementation of access control systems.
In this chapter, the emerging trends in the access control eld to address the new needs and
desiderata of todays systems are presented as well as some vendor implementation.