Authentication and authenticated key exchanges
Designs, Codes and Cryptography
Providing location information in a ubiquitous computing environment (panel session)
SOSP '93 Proceedings of the fourteenth ACM symposium on Operating systems principles
The Cricket location-support system
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Securing context-aware applications using environment roles
SACMAT '01 Proceedings of the sixth ACM symposium on Access control models and technologies
TRBAC: A temporal role-based access control model
ACM Transactions on Information and System Security (TISSEC)
Security Considerations for a Distributed LocationService
Journal of Network and Systems Management
Project Aura: Toward Distraction-Free Pervasive Computing
IEEE Pervasive Computing
On context in authorization policy
Proceedings of the eighth ACM symposium on Access control models and technologies
Providing Contextual Information to Pervasive Computing Applications
PERCOM '03 Proceedings of the First IEEE International Conference on Pervasive Computing and Communications
Trust for Ubiquitous, Transparent Collaboration
PERCOM '03 Proceedings of the First IEEE International Conference on Pervasive Computing and Communications
OSDI'00 Proceedings of the 4th conference on Symposium on Operating System Design & Implementation - Volume 4
Proceedings of the 6th international conference on Mobile data management
Access control to people location information
ACM Transactions on Information and System Security (TISSEC)
Supporting location-based conditions in access control policies
ASIACCS '06 Proceedings of the 2006 ACM Symposium on Information, computer and communications security
The new Casper: query processing for location services without compromising privacy
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
A peer-to-peer spatial cloaking algorithm for anonymous location-based service
GIS '06 Proceedings of the 14th annual ACM international symposium on Advances in geographic information systems
On the Formal Analysis of a Spatio-temporal Role-Based Access Control Model
Proceeedings of the 22nd annual IFIP WG 11.3 working conference on Data and Applications Security
A Spatio-temporal Access Control Model Supporting Delegation for Pervasive Computing Applications
TrustBus '08 Proceedings of the 5th international conference on Trust, Privacy and Security in Digital Business
Ensuring spatio-temporal access control for real-world applications
Proceedings of the 14th ACM symposium on Access control models and technologies
Towards Achieving Personalized Privacy for Location-Based Services
Transactions on Data Privacy
A spatio-temporal role-based access control model
Proceedings of the 21st annual IFIP WG 11.3 working conference on Data and applications security
Security patterns for physical access control systems
Proceedings of the 21st annual IFIP WG 11.3 working conference on Data and applications security
Privacy preservation in the dissemination of location data
ACM SIGKDD Explorations Newsletter
A fuzzy trust model using multiple evaluation criteria
FSKD'06 Proceedings of the Third international conference on Fuzzy Systems and Knowledge Discovery
An effective method for location privacy in ubiquitous computing
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
A privacy-aware service protocol for ubiquitous computing environments
EUC'06 Proceedings of the 2006 international conference on Emerging Directions in Embedded and Ubiquitous Computing
A quantitative trust model based on multiple evaluation criteria
KES'05 Proceedings of the 9th international conference on Knowledge-Based Intelligent Information and Engineering Systems - Volume Part I
A legal ontology to support privacy preservation in location-based services
OTM'06 Proceedings of the 2006 international conference on On the Move to Meaningful Internet Systems: AWeSOMe, CAMS, COMINF, IS, KSinBIT, MIOS-CIAO, MONET - Volume Part II
Some security issues of wireless systems
ISSADS'05 Proceedings of the 5th international conference on Advanced Distributed Systems
Spatial context in role-based access control
ICISC'06 Proceedings of the 9th international conference on Information Security and Cryptology
LRBAC: a location-aware role-based access control model
ICISS'06 Proceedings of the Second international conference on Information Systems Security
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Ubiquitous computing uses a variety of information for which access needs to be controlled. For instance, a person's current location is asensitive piece of information, which only authorized entities should be able to learn. Several challenges arise in the specification and implementation of policies controlling access to location information. For example, there can be multiple sources of location information, the sources can be within different administrative domains, different administrative domains might allow different entities to specify policies, and policies need to be flexible. Weaddress these issues in our design of an access control mechanism for a people location system. Our design encodes policies as digital certificates. We present an example implementation based on SPKI/SDSI certificates. Using measurements, we quantify the influence of access control on query processing time. We also discuss trade-offs between RSA-based and DSA-based signature schemes for digital certificates.