Introduction to algorithms
Cryptography: Theory and Practice,Second Edition
Cryptography: Theory and Practice,Second Edition
Practical Techniques for Searches on Encrypted Data
SP '00 Proceedings of the 2000 IEEE Symposium on Security and Privacy
The new Casper: query processing for location services without compromising privacy
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
Searchable symmetric encryption: improved definitions and efficient constructions
Proceedings of the 13th ACM conference on Computer and communications security
Anonymous Usage of Location-Based Services Through Spatial and Temporal Cloaking
Proceedings of the 1st international conference on Mobile systems, applications and services
Supporting anonymous location queries in mobile environments with privacygrid
Proceedings of the 17th international conference on World Wide Web
Conjunctive, subset, and range queries on encrypted data
TCC'07 Proceedings of the 4th conference on Theory of cryptography
Deterministic and efficiently searchable encryption
CRYPTO'07 Proceedings of the 27th annual international cryptology conference on Advances in cryptology
Fast secure computation of set intersection
SCN'10 Proceedings of the 7th international conference on Security and cryptography for networks
SP '11 Proceedings of the 2011 IEEE Symposium on Security and Privacy
Privacy preserving keyword searches on remote encrypted data
ACNS'05 Proceedings of the Third international conference on Applied Cryptography and Network Security
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In this paper, we propose a secure cloud-assisted location based reminder system. The proposed system is secure and responsive. Our system outsources the location testing task --- testing whether the current location is near a reminder location --- to the cloud server such that the device synchronization is not necessary in the system. This feature makes the proposed system more responsive, especially when the reminder message is of large size, e.g., audio, images. Above all, the proposed system protects a user's location privacy and the confidentiality of the reminder message. The system is designed in a way that the cloud server can perform location testing for a user but cannot learn about her current location, reminder locations, and reminder messages. We prove the security of the proposed system and demonstrate its efficiency using simulations on a Motorola Droid smartphone.