Abstract
Most electronic payment systems for applications, such as eTicketing and eToll, involve a single entity acting as both merchant and bank. In this paper, we propose an efficient privacy-preserving post-payment eCash system suitable for this particular use case that we refer to, afterwards, as private eCash. To this end, we introduce a new partially blind signature scheme based on a recent Algebraic MAC scheme due to Chase et al. Unlike previous constructions, it allows multiple presentations of the same signature in an unlinkable way. Using it, our system is the first versatile private eCash system where users must only hold a sole reusable token (i.e. a reusable coin spendable to a unique merchant). It also enables identity and token revocations as well as flexible payments. Indeed, our payment tokens are updated in a partially blinded way to collect refunds without invading user’s privacy. By implementing it on a Global Platform compliant SIM card, we show its efficiency and suitability for real-world use cases, even for delay-sensitive applications and on constrained devices as a transaction can be performed in only 205 ms.
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References
Abe, M., Fujisaki, E.: How to date blind signatures. In: Kim, K., Matsumoto, T. (eds.) ASIACRYPT 1996. LNCS, vol. 1163, pp. 244–251. Springer, Heidelberg (1996). doi:10.1007/BFb0034851
Arfaoui, G., Lalande, J., Traoré, J., Desmoulins, N., Berthomé, P., Gharout, S.: A practical set-membership proof for privacy-preserving NFC mobile ticketing. In: Proceedings on Privacy Enhancing Technologies abs/1505.03048 (2015)
Au, M.H., Liu, J., Fang, J., Jiang, Z., Susilo, W., Zhou, J.: A new payment system for enhancing location privacy of electric vehicles. IEEE Trans. Veh. Technol. 63(1), 3–18 (2014)
Balasch, J., Rial, A., Troncoso, C., Preneel, B., Verbauwhede, I., Geuens, C.: PrETP: privacy-preserving electronic toll pricing. In: Proceedings of the 19th USENIX Conference on Security, USENIX Security 2010, p. 5 (2010)
Chase, M., Meiklejohn, S., Zaverucha, G.: Algebraic MACs and keyed-verification anonymous credentials. In: Proceedings of the 2014 ACM SIGSAC CCS, CCS 2014, pp. 1205–1216. ACM, New York (2014)
Chaum, D.: Blind signatures for untraceable payments. In: Chaum, D., Rivest, R., Sherman, A. (eds.) Advances in Cryptology, pp. 199–203. Springer, New York (1983)
Day, J., Huang, Y., Knapp, E., Goldberg, I.: SPEcTRe: spot-checked private ecash tolling at roadside. In: WPES, pp. 61–68. ACM (2011)
Fouque, P.-A., Poupard, G., Stern, J.: Sharing decryption in the context of voting or lotteries. In: Frankel, Y. (ed.) FC 2000. LNCS, vol. 1962, pp. 90–104. Springer, Heidelberg (2001). doi:10.1007/3-540-45472-1_7
Hufschmitt, E., Traoré, J.: Fair blind signatures revisited. In: Takagi, T., Okamoto, E., Okamoto, T., Okamoto, T. (eds.) Pairing 2007. LNCS, vol. 4575, pp. 268–292. Springer, Heidelberg (2007). doi:10.1007/978-3-540-73489-5_14
Meiklejohn, S., Mowery, K., Checkoway, S., Shacham, H.: The phantom tollbooth: privacy-preserving electronic toll collection in the presence of driver collusion. In: Proceedings of the 20th USENIX Conference on Security, SEC 2011, p. 32 (2011)
Milutinovic, M., Decroix, K., Naessens, V., De Decker, B.: Privacy-preserving public transport ticketing system. In: Samarati, P. (ed.) DBSec 2015. LNCS, vol. 9149, pp. 135–150. Springer, Cham (2015). doi:10.1007/978-3-319-20810-7_9
Pointcheval, D., Sanders, O.: Short randomizable signatures. In: Sako, K. (ed.) CT-RSA 2016. LNCS, vol. 9610, pp. 111–126. Springer, Cham (2016). doi:10.1007/978-3-319-29485-8_7
Popa, R.A., Balakrishnan, H., Blumberg, A.J.: VPriv: protecting privacy in location-based vehicular services. In: Proceedings of the 18th Conference on USENIX Security Symposium, SSYM 2009, pp. 335–350 (2009)
Rupp, A., Hinterwälder, G., Baldimtsi, F., Paar, C.: P4R: privacy-preserving pre-payments with refunds for transportation systems. In: Sadeghi, A.-R. (ed.) FC 2013. LNCS, vol. 7859, pp. 205–212. Springer, Heidelberg (2013). doi:10.1007/978-3-642-39884-1_17
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Barki, A., Brunet, S., Desmoulins, N., Gambs, S., Gharout, S., Traoré, J. (2017). Private eCash in Practice (Short Paper). In: Grossklags, J., Preneel, B. (eds) Financial Cryptography and Data Security. FC 2016. Lecture Notes in Computer Science(), vol 9603. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-54970-4_6
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DOI: https://doi.org/10.1007/978-3-662-54970-4_6
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