NDLI: Cover locations: availing location-based services without revealing the location

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Cover locations: availing location-based services without revealing the location

Content Provider	ACM Digital Library
Author	Dsouza, Avis Peddinti, Sai Teja Saxena, Nitesh
Abstract	Location-Based Services (LBSs) have been gaining popularity due to a wide range of interesting and important applications being developed. However, the users availing such services are concerned about their location privacy, in that they are forced to reveal their sensitive location information to untrusted third-parties. In this paper, we propose a new privacy-preserving approach, Cover Locations, which allows a user to access an LBS without revealing his/her actual location. Based on its current location, the user's device queries for a few specifically chosen surrounding locations and constructs the results corresponding to its location from the results obtained for each queried location. Since the user location does not leave the user's device - as either a latitude and longitude pair, or as an obfuscated region - the user is guaranteed very high level of privacy. The Cover Locations approach only requires minimal changes on the user's device and can be readily deployed by privacy-conscious users. An adversary, trying to identify the user location, can only resolve the location to few triangular regions and not to the actual location itself. We evaluate the privacy provided by Cover Locations based on the number of locations queried and the total area under the resolved triangular regions. We also ascertain the robustness of Cover Locations approach when the adversary has access to a short-term user history, employing machine learning techniques. Overall, our results show that the proposed solution, which requires minor computations without the need for any out-of-band information such as traffic densities in a region or the road network information, is superior to other client-based solutions.
Starting Page	143
Ending Page	152
Page Count	10
File Format	PDF
ISBN	9781450310024
DOI	10.1145/2046556.2046576
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2011-10-17
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	K-anonymity Location privacy Location-based services
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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