Abstract:
A Context-Aware Usage
CONtrol (CA- UCON)
model is an extension of the traditional UCON model which
enable adaptation to environmental changes in the aim of
preserving continuity of access. When the authorisations and
obligations requirements are met by the subject and the object, and
the conditions requirements fail due to changes in the environment
or the system con- text, CA-UCON model triggers specific actions to
adapt to the new situation. Besides the data protection, CA-UCON
model so enhances the quality of services, striving to keep explicit
interactions with the user at a minimum. In this paper, we propose
an architecture of the reference monitor for the CA-UCON model and
investigate a variety of enforcement approaches in ubiquitous
computing systems; whether centralised, distributed or hybrid;
depending on applications.
