Indexing the positions of continuously moving objects
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
Query operations for moving objects database systems
Proceedings of the 8th ACM international symposium on Advances in geographic information systems
Moving Objects Databases: Issues and Solutions
SSDBM '98 Proceedings of the 10th International Conference on Scientific and Statistical Database Management
Mix Zones: User Privacy in Location-aware Services
PERCOMW '04 Proceedings of the Second IEEE Annual Conference on Pervasive Computing and Communications Workshops
Bluetooth and WAP push based location-aware mobile advertising system
Proceedings of the 2nd international conference on Mobile systems, applications, and services
STRIPES: an efficient index for predicted trajectories
SIGMOD '04 Proceedings of the 2004 ACM SIGMOD international conference on Management of data
An Authorization Model for Geospatial Data
IEEE Transactions on Dependable and Secure Computing
Efficient indexing of the historical, present, and future positions of moving objects
Proceedings of the 6th international conference on Mobile data management
Proceedings of the 6th international conference on Mobile data management
Query and update efficient B+-tree based indexing of moving objects
VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
Spatial security policies for mobile agents in a sentient computing environment
FASE'03 Proceedings of the 6th international conference on Fundamental approaches to software engineering
Unified index for mobile object data and authorizations
ESORICS'05 Proceedings of the 10th European conference on Research in Computer Security
Mobile payment system for prepayment meter
ISP'06 Proceedings of the 5th WSEAS International Conference on Information Security and Privacy
Security key: a new mobile payment solution
ISP'06 Proceedings of the 5th WSEAS International Conference on Information Security and Privacy
Mobile prepayment solution for meter based on new generation communication
CEA'09 Proceedings of the 3rd WSEAS international conference on Computer engineering and applications
Research of utility prepayment system based on wireless communication
WSEAS TRANSACTIONS on COMMUNICATIONS
Location privacy protection through obfuscation-based techniques
Proceedings of the 21st annual IFIP WG 11.3 working conference on Data and applications security
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
Security patterns for physical access control systems
Proceedings of the 21st annual IFIP WG 11.3 working conference on Data and applications security
A unified index structure for efficient enforcement of spatiotemporal authorisations
International Journal of Information and Computer Security
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Recent advances to mobile communication, Global Positioning System (GPS) and Radio Frequency Identification (RFID) technologies have propelled the growth of a number of mobile services. These require maintaining mobile object's location information and efficiently serving access requests on the past, present and future status of the moving objects. Moreover, these services raise a number of security and privacy challenges. To address this, security policies are specified to ensure controlled access to the mobile user's location and movement trajectories, their profile information, and stationary resources based on the mobile user's spatiotemporal information. Considering the basic authorization specification 〈subject, object, privilege 〉, in a mobile environment, a moving object can be a subject, an object, or both. Serving an access request requires to search for the desired moving objects that satisfy the query, as well as enforce the security policies. Often, enforcing security incurs overhead, and as a result may degrade the performance of a system. To alleviate this problem, recently Atluri and Guo have proposed an unified index structure, STPR-tree, to organize both the moving objects and authorizations specified over them. However, the STPR-tree is not capable supporting security policies based on tracking of mobile users. In this paper, we present an index structure, called SPPF-tree, which maintains past, present and future positions of the moving objects along with authorizations by employing partial persistent storage. We demonstrate how the SPPF-tree can be constructed and maintained, and provide algorithms to process two types of access requests, including moving object requests by stationary subjects such as locate and track, and stationary object requests by moving subjects.