Paper 2018/525

Location-Proof System based on Secure Multi-Party Computations

Aurélien Dupin, Jean-Marc Robert, and Christophe Bidan


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.

Available format(s)
Cryptographic protocols
Publication info
Preprint. MINOR revision.
Location Proof SystemMulti-Party ComputationsSecure Maximum Protocol
Contact author(s)
dupin aurelien @ gmail com
2018-06-04: received
Short URL
Creative Commons Attribution


      author = {Aurélien Dupin and Jean-Marc Robert and Christophe Bidan},
      title = {Location-Proof System based on Secure Multi-Party Computations},
      howpublished = {Cryptology ePrint Archive, Paper 2018/525},
      year = {2018},
      note = {\url{}},
      url = {}
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