A Novel Micropayment Scheme with Complete Anonymity
Xin Zhao, LV Yu-qin, Wenxin He · 2009
The customerpsilas privacy may be exposed in most existing micropayment schemes. To protect the privacy of a customerpsilas identity, according to the definitions of anonymity given in this paper, a novel micropayment scheme (called xPay) with security, efficiency and complete anonymity is proposed. The scheme, based on hash chain, introduces both the debit-based payment mode and the pseudonym mechanism using prepaid cards, with the purpose of complete anonymity. In addition, in order to control the operation cost, a lower bound of the requesting coin quantity during one exchange, redemption or transfer procedure is specially set, and this setting is employed in the xPay scheme.