Efficient E-coupon systems with strong user privacy

Authors

Weiwei Liu, University of WollongongFollow
Yi Mu, University of WollongongFollow
Guomin Yang, University of WollongongFollow
Yong Yu, Shaanxi Normal University, University of Electronic Science and Technology of China, Guilin University of Electronic TechnologyFollow

RIS ID

127893

Publication Details

Liu, W., Mu, Y., Yang, G. & Yu, Y. (2017). Efficient E-coupon systems with strong user privacy. Telecommunication Systems, 64 (4), 695-708.

Abstract

We propose two novel e-coupon systems that can achieve the following new properties: (1) The coupon issuer (or service provider) can trace the identity of a dishonest user while the identity privacy (or anonymity) of a honest user is still well protected. (2) A honest user's redemption privacy (i.e., the items chosen when redeeming an e-coupon) is well protected from the service provider. (3) If a dishonest user redeems an e-coupon for more than the pre-determined number of times, then the user will lose the redemption privacy (i.e., all the choices the user has made in the pre- vious redemptions can be revealed). We first propose a novel blind signature scheme that we employ together with obliv- ious transfer to construct our first e-coupon system, which achieves the first two properties without the involvement of any trusted third party. Then we propose a novel oblivious transfer scheme and use it to construct the second e-coupon system that can achieve all the properties given above. We also define the formal security models for these new security requirements, and show that our new e-coupon systems are proven secure in the proposed models