Abstract
The increasing need to share information in dynamic environments has created a requirement for risk-aware access control systems. In this paper, we present a metamodel for risk-aware authorization that captures the key aspects of a system in relation to risk mitigation. In particular, we develop various risk-aware models as instances of the metamodel that broadly differ in the form of risk mitigation that is used (system obligations and user obligations respectively), and study how those obligations are applied to reduce and account for the risk incurred by granting access. Unlike system obligations, an access control system cannot guarantee that user obligations are fulfilled. We propose two approaches to defining risk-aware authorization semantics that takes unfulfilled obligations into account: one is to restrict users' future access because of prior failure to fulfill obligations, and the other is to “reward” users who have been diligent in fulfilling their obligations by permitting risky access requests.
Original language | English |
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Title of host publication | 2012 Tenth Annual International Conference on Privacy, Security and Trust |
Subtitle of host publication | Institut Mines-Telecom, Paris, France, July 16-18, 2012 |
Place of Publication | Washington DC, USA |
Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
Pages | 145-152 |
Number of pages | 8 |
ISBN (Electronic) | 9781467323253 |
ISBN (Print) | 9781467323239 |
DOIs | |
Publication status | Published - 2012 |
Event | Proceedings of the Tenth Annual Conference on Privacy, Security and Trust - Paris, France Duration: 16 Jul 2012 → 18 Jul 2012 |
Conference
Conference | Proceedings of the Tenth Annual Conference on Privacy, Security and Trust |
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Country/Territory | France |
City | Paris |
Period | 16/07/12 → 18/07/12 |
Keywords
- authorization
- semantics
- context