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8551 Data degradation to enhance privacy for the Ambient Intelligence
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van Heerde, H.J.W. and Anciaux, N.L.G. (2006) Data degradation to enhance privacy for the Ambient Intelligence. Technical Report TR-CTIT-06-74, Centre for Telematics and Information Technology University of Twente, Enschede. ISSN 1381-3625

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Increasing research in ubiquitous computing techniques towards the development of an Ambient Intelligence raises issues regarding privacy. To gain the required data needed to enable application in this Ambient Intelligence to offer smart services to users, sensors will monitor users' behavior to fill personal context histories. Those context histories will be stored on database/information systems which we consider as honest: they can be trusted now, but might be subject to attacks in the future. Making this assumption implies that protecting context histories by means of access control might be not enough. To reduce the impact of possible attacks, we propose to use limited retention techniques. In our approach, we present applications a degraded set of data with a retention delay attached to it which matches both application requirements and users privacy wishes. Data degradation can be twofold: the accuracy of context data can be lowered such that the less privacy sensitive parts are retained, and context data can be transformed such that only particular abilities for application remain available. Retention periods can be specified to trigger irreversible removal of the context data from the system.

Item Type:Internal Report (Technical Report)
Research Group:EWI-DB: Databases
Research Program:CTIT-NICE: Natural Interaction in Computer-mediated Environments
Research Project:CADMAI: Towards Context-Aware Data Management for Ambient Intelligence
ID Code:8551
Deposited On:15 January 2007
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