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RHyTHM: A Randomized Hybrid Scheme To Hide in the Mobile Crowd
KTH, School of Electrical Engineering (EES), Network and Systems engineering. (Networked Systems Security)ORCID iD: 0000-0003-1778-1416
KTH, School of Computer Science and Communication (CSC). (Networked Systems Security)
KTH, School of Electrical Engineering (EES), Network and Systems engineering. (Networked Systems Security)ORCID iD: 0000-0002-3267-5374
2017 (English)In: IEEE Vehicular Networking Conference (VNC) 2017, IEEE, 2017, p. 155-158Conference paper, Published paper (Refereed)
Abstract [en]

Any on-demand pseudonym acquisition strategy is problematic should the connectivity to the credential management infrastructure be intermittent. If a vehicle runs out of pseudonyms with no connectivity to refill its pseudonym pool, one solution is the on-the-fly generation of pseudonyms, e.g., leveraging anonymous authentication. However, such a vehicle would stand out in the crowd: one can simply distinguish pseudonyms, thus signed messages, based on the pseudonym issuer signature, link them and track the vehicle. To address this challenge, we propose a randomized hybrid scheme, RHyTHM, to enable vehicles to remain operational when disconnected without compromising privacy: vehicles with valid pseudonyms help others to enhance their privacy by randomly joining them in using on-the-fly self-certified pseudonyms along with aligned lifetimes. This way, the privacy of disconnected users is enhanced with a reasonable computational overhead. 

Place, publisher, year, edition, pages
IEEE, 2017. p. 155-158
Keyword [en]
Security, Privacy, Vehicular PKI, Public Key Infrastructure, Hybrid Scheme
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-219868ISI: 000426903100034OAI: oai:DiVA.org:kth-219868DiVA, id: diva2:1165811
Conference
IEEE Vehicular Networking Conference (VNC), November 27-29, 2017, Torino, Italy.
Note

QC 20171215

Available from: 2017-12-13 Created: 2017-12-13 Last updated: 2018-04-03Bibliographically approved

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Khodaei, MohammadMessing, AndreasPapadimitratos, Panagiotis
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CiteExportLink to record
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Citation style
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