Indexing the positions of continuously moving objects
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
The SH-tree: A Super Hybrid Index Structure for Multidimensional Data
DEXA '01 Proceedings of the 12th International Conference on Database and Expert Systems Applications
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
The Bdual-Tree: indexing moving objects by space filling curves in the dual space
The VLDB Journal — The International Journal on Very Large Data Bases
Information Security and Cryptology --- ICISC 2008
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
An Obfuscation-Based Approach for Protecting Location Privacy
IEEE Transactions on Dependable and Secure Computing
On guaranteeing k-anonymity in location databases
DEXA'11 Proceedings of the 22nd international conference on Database and expert systems applications - Volume Part I
An open design privacy-enhancing platform supporting location-based applications
Proceedings of the 6th International Conference on Ubiquitous Information Management and Communication
Semantic Bob-tree: a new obfuscation technique for location privacy protection
Proceedings of the 10th International Conference on Advances in Mobile Computing & Multimedia
A novel trajectory privacy-preserving future time index structure in moving object databases
ICCCI'12 Proceedings of the 4th international conference on Computational Collective Intelligence: technologies and applications - Volume Part I
ICT-EurAsia'13 Proceedings of the 2013 international conference on Information and Communication Technology
Semantic-Aware obfuscation for location privacy at database level
ICT-EurAsia'13 Proceedings of the 2013 international conference on Information and Communication Technology
Proceedings of the 8th International Conference on Ubiquitous Information Management and Communication
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The privacy protection of personal location information increasingly gains special attention in the field of location-based services, and obfuscation is the most popular technique aiming at protecting this sensitive information. However, all of the conventional obfuscation techniques are geometry-based and separated from the database level. Thus, the query processing has two timeconsuming phases due to the number of disk accesses required to retrieve the user's exact location, and the location obfuscation. Also, since these techniques are geometry-based, they cannot assure location privacy when the adversary has knowledge about the geography of the obfuscated region. We address these problems by proposing Bob-tree, an index structure that is based on Bdual-tree and contains geographic-aware information on its nodes. Experiments show that Bob-tree provides a significant improvement over the algorithm separated from the database level for query processing time and location privacy protection.