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PrivatePool: Privacy-Preserving Ridesharing

Per A. Hallgren (Institutionen för Data- och informationsteknik, Informationssäkerhet (Chalmers)) ; Claudio Orlandi ; Andrei Sabelfeld (Institutionen för Data- och informationsteknik, Informationssäkerhet (Chalmers))
Computer Security Foundations (1063-6900). (2017)
[Artikel, refereegranskad vetenskaplig]

Location-based services have seen tremendous developments over the recent years. These services have revolutionized transportation business, as witnessed by the success of Uber, Lyft, BlaBlaCar, and the like. Yet from the privacy point of view, the state of the art leaves much to be desired. The location of the user is typically shared with the service, opening up for privacy abuse, as in some recently publicized cases. This paper proposes PrivatePool, a model for privacy-preserving ridesharing. We develop secure multi-party computation techniques for endpoint and trajectory matching that allow dispensing with trust to third parties. At the same time, the users learn of a ride segment they can share and nothing else about other users’ location. We establish formal privacy guarantees and investigate how different riding patterns affect the privacy, utility, and performance tradeoffs between approaches based on the proximity of endpoints vs. proximity of trajectories.



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Denna post skapades 2017-08-16.
CPL Pubid: 251212

 

Institutioner (Chalmers)

Institutionen för Data- och informationsteknik, Informationssäkerhet (Chalmers)

Ämnesområden

Informations- och kommunikationsteknik
Data- och informationsvetenskap

Chalmers infrastruktur

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