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Title: Assuring spatio-temporal integrity on mobile devices with minimum location disclosure
Authors: Hu, H 
Chen, Q
Xu, J
Choi, B
Issue Date: 1-Nov-2017
Source: IEEE transactions on mobile computing, 1 Nov. 2017, v. 16, no. 11, 7879813, p. 3000-3013
Abstract: Since the boom of smartphones and location-based services, spatio-Temporal data (i.e., user locations with timestamps) have become increasingly essential in many real-life applications. To ensure these data are faithfully extracted from the underlying location tracking hardware and not altered by any malicious party or the user himself/herself, integrity assurance schemes such as digital signatures or message authentication codes (MAC) must be adopted. However, these conventional schemes disclose to the verifier the complete plaintext location and thus jeopardize users' privacy. In this paper, we propose an integrity assurance scheme with minimum location disclosure. That is, the granule of the disclosed location is just small enough to prove the user is/has been to a certain place, and the verifier cannot learn anything beyond it. To this end, we propose a new MAC scheme called Prefix-verifiable MAC (PMAC), based on which we design indexes and protocols to authenticate both spatial and spatio-Temporal predicates. Security analysis and experimental results show our scheme is both secure and efficient for practical use.
Keywords: Integrity assurance
Privacy protection
Spatio-Temporal data
Publisher: Institute of Electrical and Electronics Engineers
Journal: IEEE transactions on mobile computing 
ISSN: 1536-1233
EISSN: 1558-0660
DOI: 10.1109/TMC.2017.2683492
Rights: © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
The following publication H. Hu, Q. Chen, J. Xu and B. Choi, "Assuring Spatio-Temporal Integrity on Mobile Devices with Minimum Location Disclosure," in IEEE Transactions on Mobile Computing, vol. 16, no. 11, pp. 3000-3013, 1 Nov. 2017 is available at https://doi.org/10.1109/TMC.2017.2683492.
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