Paper 2017/039

SePCAR: A Secure and Privacy-Enhancing Protocol for Car Access Provision (Full Version)

Iraklis Symeonidis, Abdelrahaman Aly, Mustafa A. Mustafa, Bart Mennink, Siemen Dhooghe, and Bart Preneel


We present an efficient secure and privacy-enhancing protocol for car access provision, named SePCAR. The protocol is fully decentralised and allows users to share their cars conveniently in such a way that the security and privacy of the users is not sacrificed. It provides generation, update, revocation, and distribution mechanisms for access tokens to shared cars, as well as procedures to solve disputes and to deal with law enforcement requests, for instance in the case of car incidents. We prove that SePCAR meets its appropriate security and privacy requirements and that it is efficient: our practical efficiency analysis through a proof-of-concept implementation shows that SePCAR takes only 1.55 seconds for a car access provision.

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Publication info
Preprint. MINOR revision.
SecurityPrivacy-enhanceconnected carsapplied cryptography
Contact author(s)
iraklis symeonidis @ esat kuleuven be
2017-06-28: last of 3 revisions
2017-01-18: received
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      author = {Iraklis Symeonidis and Abdelrahaman Aly and Mustafa A.  Mustafa and Bart Mennink and Siemen Dhooghe and Bart Preneel},
      title = {{SePCAR}: A Secure and Privacy-Enhancing Protocol for Car Access Provision (Full Version)},
      howpublished = {Cryptology ePrint Archive, Paper 2017/039},
      year = {2017},
      note = {\url{}},
      url = {}
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