Abstract
Incorporating the property of transferability into an offline electronic cash (e-cash) system has turned out to be no easy matter. Most of the e-cash systems proposed so far do not provide transferability. Those who support transferability are either inefficient or requiring to be online with the help of a trustee. In this paper we present an efficient offline transferable e-cash system. The computational complexity of our system is as light as a single term e-cash system [13]. Besides, no trustee is involved in the transfer protocol. In addition to it, we propose two e-check systems constructed using similar techniques to our e-cash system. One is as efficient as a single term e-cash system and supports partial unlinkability. The other one provides complete unlinkability with a more complex setting.
The work described in this paper was done when this author was at the Department of Information Engineering, The Chinese University of Hong Kong
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Liu, J.K., Wong, S.H., Wong, D.S. (2005). Transferable E-Cash Revisit. In: Sasaki, R., Qing, S., Okamoto, E., Yoshiura, H. (eds) Security and Privacy in the Age of Ubiquitous Computing. SEC 2005. IFIP Advances in Information and Communication Technology, vol 181. Springer, Boston, MA. https://doi.org/10.1007/0-387-25660-1_12
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DOI: https://doi.org/10.1007/0-387-25660-1_12
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