Literature Database Entry


David Eckhoff, Christoph Sommer, Tobias Gansen, Reinhard German and Falko Dressler, "SlotSwap: Strong and Affordable Location Privacy in Intelligent Transportation Systems," IEEE Communications Magazine, vol. 49 (11), pp. 126–133, November 2011.


Public acceptance, and thus the economical success of an Intelligent Transportation System (ITS), is highly dependent on the quality of deployed privacy mechanisms. In general, neither users nor operators should be able to track a given individual. One approach to facilitate this is the usage of pseudonym pools, which allow vehicles to autonomously switch between different identities. We extend this scheme with that of a time-slotted pseudonym pool of static size, reducing the storage and computation needs of the envisioned ITS while further improving users' privacy. In addition, we allow the exchange of pseudonyms between vehicles, eliminating the mapping between vehicles and pseudonyms even for the ITS operator. We support the exchange of both current and future pseudonyms, further enhancing users' privacy. We evaluate the feasibility of our approach and back up privacy claims by performing a simulative study of the system using the entropy of nodes' anonymity sets as the primary metric.

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David Eckhoff
Christoph Sommer
Tobias Gansen
Reinhard German
Falko Dressler

BibTeX reference

    author = {Eckhoff, David and Sommer, Christoph and Gansen, Tobias and German, Reinhard and Dressler, Falko},
    doi = {10.1109/MCOM.2011.6069719},
    title = {{SlotSwap: Strong and Affordable Location Privacy in Intelligent Transportation Systems}},
    pages = {126--133},
    journal = {IEEE Communications Magazine},
    issn = {0163-6804},
    publisher = {IEEE},
    month = {11},
    number = {11},
    volume = {49},
    year = {2011},

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