Experiences of developing and deploying a context-aware tourist guide: the GUIDE project
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Code and Other Laws of Cyberspace
Code and Other Laws of Cyberspace
MyBus: Helping Bus Riders Make Informed Decisions
IEEE Intelligent Systems
Unpacking "privacy" for a networked world
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Location Privacy in Pervasive Computing
IEEE Pervasive Computing
A Privacy Awareness System for Ubiquitous Computing Environments
UbiComp '02 Proceedings of the 4th international conference on Ubiquitous Computing
Anonymous Connections and Onion Routing
SP '97 Proceedings of the 1997 IEEE Symposium on Security and Privacy
Challenge: ubiquitous location-aware computing and the "place lab" initiative
Proceedings of the 1st ACM international workshop on Wireless mobile applications and services on WLAN hotspots
Proceedings of the 1st ACM international workshop on Wireless mobile applications and services on WLAN hotspots
An architecture for privacy-sensitive ubiquitous computing
Proceedings of the 2nd international conference on Mobile systems, applications, and services
Privacy risk models for designing privacy-sensitive ubiquitous computing systems
DIS '04 Proceedings of the 5th conference on Designing interactive systems: processes, practices, methods, and techniques
Location disclosure to social relations: why, when, & what people want to share
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Developing privacy guidelines for social location disclosure applications and services
SOUPS '05 Proceedings of the 2005 symposium on Usable privacy and security
Anonymous Usage of Location-Based Services Through Spatial and Temporal Cloaking
Proceedings of the 1st international conference on Mobile systems, applications and services
Place lab: device positioning using radio beacons in the wild
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
Social disclosure of place: from location technology to communication practices
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
PAWNs: Satisfying the need for ubiquitos secure connectivity and location services
IEEE Wireless Communications
Over-exposed?: privacy patterns and considerations in online and mobile photo sharing
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
A mobile application framework for the geospatial web
Proceedings of the 16th international conference on World Wide Web
Preserving privacy in gps traces via uncertainty-aware path cloaking
Proceedings of the 14th ACM conference on Computer and communications security
End-user privacy in human-computer interaction
Foundations and Trends in Human-Computer Interaction
Anonysense: privacy-aware people-centric sensing
Proceedings of the 6th international conference on Mobile systems, applications, and services
Active GSM cell-id tracking: "Where Did You Disappear?"
Proceedings of the first ACM international workshop on Mobile entity localization and tracking in GPS-less environments
Proceedings of the 11th international symposium on Modeling, analysis and simulation of wireless and mobile systems
AnonySense: Opportunistic and Privacy-Preserving Context Collection
Pervasive '08 Proceedings of the 6th International Conference on Pervasive Computing
Understanding and capturing people's privacy policies in a mobile social networking application
Personal and Ubiquitous Computing
Opportunistic sensing: security challenges for the new paradigm
COMSNETS'09 Proceedings of the First international conference on COMmunication Systems And NETworks
Preserving privacy in participatory sensing systems
Computer Communications
Performance study of active tracking in a cellular network using a modular signaling platform
Proceedings of the 8th international conference on Mobile systems, applications, and services
AnonySense: A system for anonymous opportunistic sensing
Pervasive and Mobile Computing
Proceedings of the 13th international conference on Ubiquitous computing
Shadow: a middleware in pervasive computing environment for user controllable privacy protection
EuroSSC'06 Proceedings of the First European conference on Smart Sensing and Context
Personalization and privacy: a survey of privacy risks and remedies in personalization-based systems
User Modeling and User-Adapted Interaction
People-centric sensing in assistive healthcare: Privacy challenges and directions
Security and Communication Networks
Middleware for location privacy: an overview
Proceedings of the 2012 ACM Research in Applied Computation Symposium
Radiator: context propagation based on delayed aggregation
Proceedings of the 2013 conference on Computer supported cooperative work
Adaptive information-sharing for privacy-aware mobile social networks
Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing
A Privacy Preserving Method Using Privacy Enhancing Techniques for Location Based Services
Mobile Networks and Applications
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The emergence of location-based computing promises new and compelling applications, but raises very real privacy risks. Existing approaches to privacy generally treat people as the entity of interest, often using a fidelity tradeoff to manage the costs and benefits of revealing a person's location. However, these approaches cannot be applied in some applications, as a reduction in precision can render location information useless. This is true of a category of applications that use location data collected from multiple people to infer such information as whether there is a traffic jam on a bridge, whether there are seats available in a nearby coffee shop, when the next bus will arrive, or if a particular conference room is currently empty. We present hitchhiking, a new approach that treats locations as the primary entity of interest. Hitchhiking removes the fidelity tradeoff by preserving the anonymity of reports without reducing the precision of location disclosures. We can therefore support the full functionality of an interesting class of location-based applications without introducing the privacy concerns that would otherwise arise.