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Portunes plus: Privacy-Preserving Fast Authentication for Dynamic Electric Vehicle Charging
KTH, School of Electrical Engineering (EES), Network and Systems engineering.ORCID iD: 0000-0002-4876-0223
2017 (English)In: IEEE Transactions on Smart Grid, ISSN 1949-3053, E-ISSN 1949-3061, Vol. 8, no 5, p. 2305-2313Article in journal (Refereed) Published
Abstract [en]

Dynamic contactless charging is an emerging technology for charging electric vehicles (EVs) on the move. For efficient charging and for proper billing, dynamic charging requires secure communication between the charging infrastructure and the EVs that supports very frequent real-time message exchange for EV authentication. In this paper, we propose Portunes+, an authentication protocol for charging pads to authenticate an EVs identity. Portunes+ uses pseudonyms to provide location privacy, allows EVs to roam between different charging sections and receive a single bill, and achieves fast authentication by relying on symmetric keys and on the spatiotemporal location of the EV. We have implemented Portunes+ on RaspberryPi 2 Model B with 900 MHz CPU and 1 GB RAM. Portunes+ allows the EV to generate authentication information within 0.15 ms and allows charging pads to verify the information within 0.11 ms. In comparison, Elliptic Curve Digital Signature Algorithm signature generation and verification take over 9 ms and over 14 ms, respectively.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC , 2017. Vol. 8, no 5, p. 2305-2313
Keywords [en]
Electric vehicles, authentication, privacy
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-214311DOI: 10.1109/TSG.2016.2522379ISI: 000408221000026Scopus ID: 2-s2.0-84958605755OAI: oai:DiVA.org:kth-214311DiVA, id: diva2:1141984
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QC 20170918

Available from: 2017-09-18 Created: 2017-09-18 Last updated: 2017-10-09Bibliographically approved

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Dán, György

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