Entry Rupp:2015:CTM from tissec.bib

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BibTeX entry

@Article{Rupp:2015:CTM,
  author =       "Andy Rupp and Foteini Baldimtsi and Gesine
                 Hinterw{\"a}lder and Christof Paar",
  title =        "Cryptographic Theory Meets Practice: Efficient and
                 Privacy-Preserving Payments for Public Transport",
  journal =      j-TISSEC,
  volume =       "17",
  number =       "3",
  pages =        "10:1--10:??",
  month =        mar,
  year =         "2015",
  CODEN =        "ATISBQ",
  DOI =          "https://doi.org/10.1145/2699904",
  ISSN =         "1094-9224 (print), 1557-7406 (electronic)",
  ISSN-L =       "1094-9224",
  bibdate =      "Fri Mar 27 17:03:46 MDT 2015",
  bibsource =    "http://portal.acm.org/;
                 http://www.math.utah.edu/pub/tex/bib/cryptography2010.bib;
                 http://www.math.utah.edu/pub/tex/bib/tissec.bib",
  abstract =     "We propose a new lightweight cryptographic payment
                 scheme for transit systems, called P4R
                 (Privacy-Preserving Pre-Payments with Refunds), which
                 is suitable for low-cost user devices with limited
                 capabilities. Using P4R, users deposit money to obtain
                 one-show credentials, where each credential allows the
                 user to make an arbitrary ride on the system. The trip
                 fare is determined on-the-fly at the end of the trip.
                 If the deposit for the credential exceeds this fare,
                 the user obtains a refund. Refund values collected over
                 several trips are aggregated in a single token, thereby
                 saving memory and increasing privacy. Our solution
                 builds on Brands's e-cash scheme to realize the
                 prepayment system and on Boneh-Lynn-Shacham (BLS)
                 signatures to implement the refund capabilities.
                 Compared to a Brands-only solution for transportation
                 payment systems, P4R allows us to minimize the number
                 of coins a user needs to pay for his rides and thus
                 minimizes the number of expensive withdrawal
                 transactions, as well as storage requirements for the
                 fairly large coins. Moreover, P4R enables flexible
                 pricing because it allows for exact payments of
                 arbitrary amounts (within a certain range) using a
                 single fast paying (and refund) transaction.
                 Fortunately, the mechanisms enabling these features
                 require very little computational overhead. Choosing
                 contemporary security parameters, we implemented P4R on
                 a prototyping payment device and show its suitability
                 for future transit payment systems. Estimation results
                 demonstrate that the data required for 20 rides consume
                 less than 10KB of memory, and the payment and refund
                 transactions during a ride take less than half a
                 second. We show that malicious users are not able to
                 cheat the system by receiving a refund that exceeds the
                 overall deposit minus the overall fare and can be
                 identified during double-spending checks. At the same
                 time, the system protects the privacy of honest users
                 in that transactions are anonymous (except for
                 deposits) and trips are unlinkable.",
  acknowledgement = ack-nhfb,
  articleno =    "10",
  fjournal =     "ACM Transactions on Information and System Security",
  journal-URL =  "http://portal.acm.org/browse_dl.cfm?idx=J789",
}

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