CA-UCON: A Context-Aware Usage Control Model

De Montfort University Open Research Archive

Show simple item record Al-Mutairi, A. en Siewe, Francois en 2012-03-14T12:35:02Z 2012-03-14T12:35:02Z 2011-09-21
dc.identifier.citation A. Al-Mutairi and F. Siewe (2011). CA-UCON: A Context-Aware Usage Control Model. In Proceedings of CASEMANS 2011, Beijing, China. en
dc.description.abstract Usage CONtrol (UCON) model is the latest major enhance- ment of the traditional access control models which enables mutability of subject and object attributes, and continuity of control on usage of resources. In UCON, access permission decision is based on three factors: authorisations, obliga- tions and conditions. While authorisations and obligations are requirements that must be ful lled by the subject and the object, conditions are subject and object independent requirements that must be satis ed by the environment. As a consequence, access permission may be revoked (and the access stopped) as a result of changes in the environment regardless of whether the authorisations and obligations re- quirements are met. This constitutes a major shortcoming of the UCON model in pervasive computing systems which constantly strive to adapt to environmental changes so as to minimise disruptions to the user. To overcome this limita- tion, this paper proposes a Context-Aware Usage CONtrol (CA-UCON) model which extends the traditional UCON model to enable adaptation to environmental changes in the aim of preserving continuity of access. When the authori- sations 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 context, CA- UCON model triggers speci c 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. en
dc.language.iso en en
dc.publisher Proceedings of CASEMANS 2011, ACM Press en
dc.subject Pervasive computing en
dc.subject context-aware en
dc.subject usage control en
dc.subject adaptive systems en
dc.title CA-UCON: A Context-Aware Usage Control Model en
dc.type Conference en
dc.researchgroup Software Technology Research Laboratory (STRL) en
dc.peerreviewed Yes en

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