Cryptology ePrint Archive: Report 2018/525

Location-Proof System based on Secure Multi-Party Computations

Aurélien Dupin and Jean-Marc Robert and Christophe Bidan

Abstract: Location-based services are now quite popular. The variety of applications and their numerous users show it clearly. However, these applications rely on the persons' honesty to use their real location. If they are motivated to lie about their position, they can do so. A location-proof system allows a prover to obtain proofs from nearby witnesses, for being at a given location at a given time. Such a proof can be used to convince a verifier later on. Yet, provers and witnesses may want to keep their location and their identity private. In this paper, a solution is presented in which a malicious adversary, acting as a prover, cannot cheat on his position and remain undetected. It relies on multi-party computations and group-signature schemes to protect the private information of both the prover and the witnesses against any semi-honest participant.

Category / Keywords: cryptographic protocols / Location Proof System; Multi-Party Computations; Secure Maximum Protocol

Date: received 28 May 2018

Contact author: dupin aurelien at gmail com

Available format(s): PDF | BibTeX Citation

Version: 20180604:210731 (All versions of this report)

Short URL: ia.cr/2018/525