PODS '99 Proceedings of the eighteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Indexing the positions of continuously moving objects
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
Communications of the ACM
Security Considerations for a Distributed LocationService
Journal of Network and Systems Management
An Extended Authorization Model for Relational Databases
IEEE Transactions on Knowledge and Data Engineering
A Content-Based Authorization Model for Digital Libraries
IEEE Transactions on Knowledge and Data Engineering
Modeling and Querying Moving Objects
ICDE '97 Proceedings of the Thirteenth International Conference on Data Engineering
An Efficient Indexing Scheme for Multi-dimensional Moving Objects
ICDT '03 Proceedings of the 9th International Conference on Database Theory
Moving Objects Databases: Issues and Solutions
SSDBM '98 Proceedings of the 10th International Conference on Scientific and Statistical Database Management
Research Challenges in Location-Enabled M-Services
MDM '02 Proceedings of the Third International Conference on Mobile Data Management
Architecture of a Large-Scale Location Service
ICDCS '02 Proceedings of the 22 nd International Conference on Distributed Computing Systems (ICDCS'02)
Wireless Location Privacy Protection
Computer
An Access Control System for a Web Map Management Service
RIDE '04 Proceedings of the 14th International Workshop on Research Issues on Data Engineering: Web Services for E-Commerce and E-Government Applications (RIDE'04)
Implementing access control to people location information
Proceedings of the ninth ACM symposium on Access control models and technologies
Semantically enhanced enforcement of mobile consumer's privacy preferences
Proceedings of the 2006 ACM symposium on Applied computing
Preserving privacy in gps traces via uncertainty-aware path cloaking
Proceedings of the 14th ACM conference on Computer and communications security
Virtual trip lines for distributed privacy-preserving traffic monitoring
Proceedings of the 6th international conference on Mobile systems, applications, and services
A critical evaluation of location based services and their potential
Journal of Location Based Services
A privacy-aware access control system
Journal of Computer Security - 20th Annual IFIP WG 11.3 Working Conference on Data and Applications Security (DBSec'06)
Efficient security policy enforcement for the mobile environment
Journal of Computer Security - 20th Annual IFIP WG 11.3 Working Conference on Data and Applications Security (DBSec'06)
Shadow attacks on users' anonymity in pervasive computing environments
Pervasive and Mobile Computing
Spatiotemporal Access Control Enforcement under Uncertain Location Estimates
Proceedings of the 23rd Annual IFIP WG 11.3 Working Conference on Data and Applications Security XXIII
Protecting location privacy against spatial inferences: the PROBE approach
Proceedings of the 2nd SIGSPATIAL ACM GIS 2009 International Workshop on Security and Privacy in GIS and LBS
Efficient security policy enforcement in a location based service environment
Proceedings of the 21st annual IFIP WG 11.3 working conference on Data and applications security
The PROBE Framework for the Personalized Cloaking of Private Locations
Transactions on Data Privacy
Enhancing user privacy through data handling policies
DBSEC'06 Proceedings of the 20th IFIP WG 11.3 working conference on Data and Applications Security
Efficient enforcement of security policies based on tracking of mobile users
DBSEC'06 Proceedings of the 20th IFIP WG 11.3 working conference on Data and Applications Security
Unified index for mobile object data and authorizations
ESORICS'05 Proceedings of the 10th European conference on Research in Computer Security
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A key challenge for Mobile services is to offer personalized contents while preserving the privacy of customers. In mobile applications, location information is modeled as moving objects. Providing proper protection to customer information can be achieved by an access control system. However, providing such system is a challenging task due to: 1) the spatio-temporal nature of the constraints as well as the location information, and the interaction among them; 2) the complexity of resolving spatio-temporal and granularity conflicts; and 3) the required scalability and efficiency. In this paper, we present a solution that includes an access control model for moving objects and customer profiles. We also present a mechanism that enforces the spatio-temporal policies. The mechanism consists of three components: a text encoder, a spatio-temporal module that computes interactions between moving objects and spatio-temporal constraints, and a new data structure referred to as the Adaptive Search Multi-way trie (ASM-trie). We present the insertion and search algorithms of the ASM-trie and an evaluation study that shows the positive impact of the ASM-trie on the search efficiency.