Selective location blinding using hash chains

Authors:
Gabriele Lenzini;Sjouke Mauw;Jun Pang
Affiliations:
Interdisciplinary Centre for Security, Reliability and Trust, University of Luxembourg, Luxembourg;Interdisciplinary Centre for Security, Reliability and Trust, University of Luxembourg, Luxembourg;Computer Science and Communications, University of Luxembourg, Luxembourg
Venue:
SP'11 Proceedings of the 19th international conference on Security Protocols
Year:
2011

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Abstract

Location-based applications require a user's movements and positions to provide customized services. However, location is a sensitive piece of information that should not be revealed unless strictly necessary. In this paper we propose a procedure that allows a user to control the precision in which his location information is exposed to a service provider, while allowing his location to be certified by a location verifier. Our procedure makes use of a hash chain to certify the location information in such a way that the hashes of the chain correspond to an increasing level of precision.