TrustBus'10 Proceedings of the 7th international conference on Trust, privacy and security in digital business
Influence of attribute freshness on decision making in usage control
STM'10 Proceedings of the 6th international conference on Security and trust management
A general method for assessment of security in complex services
ServiceWave'11 Proceedings of the 4th European conference on Towards a service-based internet
Quantitative access control with partially-observable Markov decision processes
Proceedings of the second ACM conference on Data and Application Security and Privacy
Risk-Based auto-delegation for probabilistic availability
DPM'11 Proceedings of the 6th international conference, and 4th international conference on Data Privacy Management and Autonomous Spontaneus Security
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In Service Oriented Architecture (SOA) data belonging to a client (data provider) is often processed by a provider (data consumer). During this processing the data can be compromised. A client wants to be sure that its data is used in the least risky way while is under provider’s control. The risk level should be low when access to the data is granted and should remain low during the whole interaction and, maybe, some time after. Therefore, a client has to consider closely various providers and decide which one provides the service with the smallest risk. More importantly, the risk has to be constantly recomputed after granting the access to the data, i.e., usage of data must be controlled. In this work we propose a method to empower usage control with a risk-based decision making process for more efficient and flexible control of access to data. Employing this idea we show how to select a service provider using risk, re-evaluate the risk level when some changes have happened and how to improve an infrastructure in order to reduce the risk level.