The context toolkit: aiding the development of context-enabled applications
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
k-anonymity: a model for protecting privacy
International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems
The many faces of publish/subscribe
ACM Computing Surveys (CSUR)
An architecture for privacy-sensitive ubiquitous computing
Proceedings of the 2nd international conference on Mobile systems, applications, and services
The AWARE architecture: supporting context-mediated social awareness in mobile cooperation
CSCW '04 Proceedings of the 2004 ACM conference on Computer supported cooperative work
Location disclosure to social relations: why, when, & what people want to share
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
ContextPhone: A Prototyping Platform for Context-Aware Mobile Applications
IEEE Pervasive Computing
Developing privacy guidelines for social location disclosure applications and services
SOUPS '05 Proceedings of the 2005 symposium on Usable privacy and security
Ordinal, Continuous and Heterogeneous k-Anonymity Through Microaggregation
Data Mining and Knowledge Discovery
Information revelation and privacy in online social networks
Proceedings of the 2005 ACM workshop on Privacy in the electronic society
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Anonymous Usage of Location-Based Services Through Spatial and Temporal Cloaking
Proceedings of the 1st international conference on Mobile systems, applications and services
L-diversity: Privacy beyond k-anonymity
ACM Transactions on Knowledge Discovery from Data (TKDD)
Beyond the lan: techniques from network games for improving groupware performance
Proceedings of the 2007 international ACM conference on Supporting group work
User-Controllable Security and Privacy for Pervasive Computing
HOTMOBILE '07 Proceedings of the Eighth IEEE Workshop on Mobile Computing Systems and Applications
A survey on context-aware systems
International Journal of Ad Hoc and Ubiquitous Computing
Virtual trip lines for distributed privacy-preserving traffic monitoring
Proceedings of the 6th international conference on Mobile systems, applications, and services
Anonysense: privacy-aware people-centric sensing
Proceedings of the 6th international conference on Mobile systems, applications, and services
PoolView: stream privacy for grassroots participatory sensing
Proceedings of the 6th ACM conference on Embedded network sensor systems
Proceedings of the 6th ACM conference on Embedded network sensor systems
Proceedings of the 7th international conference on Mobile systems, applications, and services
On the Anonymity of Home/Work Location Pairs
Pervasive '09 Proceedings of the 7th International Conference on Pervasive Computing
Preserving privacy in location-based mobile social applications
Proceedings of the Eleventh Workshop on Mobile Computing Systems & Applications
Ear-phone: an end-to-end participatory urban noise mapping system
Proceedings of the 9th ACM/IEEE International Conference on Information Processing in Sensor Networks
A survey of mobile phone sensing
IEEE Communications Magazine
ReConMUC: adaptable consistency requirements for efficient large-scale multi-user chat
Proceedings of the ACM 2011 conference on Computer supported cooperative work
Middleware for distributed context-aware systems
OTM'05 Proceedings of the 2005 Confederated international conference on On the Move to Meaningful Internet Systems - Volume >Part I
Mobile context inference using low-cost sensors
LoCA'05 Proceedings of the First international conference on Location- and Context-Awareness
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Context-aware systems take into account the user's current context (such as location, time and activity) to enrich the user interaction with the application. However, these systems may produce huge amounts of information that must be efficiently propagated to a group of people or even large communities while still protecting the privacy of the participants. We argue that both scalability and privacy can be ensured by delaying context propagation until certain conditions are met and then aggregating such messages both at the syntactic and semantic level. Since such conditions vary from application to application, we propose Radiator, a systematic way to model the propagation characteristics of a distributed context-aware system. Our qualitative evaluation shows that Radiator is generic enough to model the needs of different context propagation scenarios. To assess the impact of the model on the scalability of an application, we developed twiRadiator, an adaptation of Twitter to the Radiator model which, while preserving user expectations, reduces bandwidth consumption to approx. one third.