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Chun-I Fan, Yu-Kuang Liang and Chien-Nan Wu Privacy enhancement for fair PayWord-based micropayment Security and Communication Networks 9

Version of Record online: 28 NOV 2012 | DOI: 10.1002/sec.672

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We propose an anonymous fair offline micropayment scheme that satisfies user anonymity and fairness, and retains the efficiency and properties of PayWord, such as an offline broker. A user can make multiple purchases from different vendors without interacting with the broker again. PayWord's postpaid mechanism is adopted in order to make our scheme more attractive to users. To the best of our knowledge, this is the first micropayment scheme that provides the aforementioned properties simultaneously.

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