简介：Atomicityisnecessaryforreliableandsecureelectroniccommercetransactionandtoguaranteetheparticipants'interests.Anatomicandefficiente-cash(electroniccash)transactionprotocolbasedontheclassicale-cashschemeispresented.Thedeliveryofdigitalgoodsisincorporatedintotheprocessofpaymentintheprotocol.Apartfromensuringallthreelevelsofatomicity,thenovelprotocolfeatureshighefficiencyandpracticabilitywithunfavorablestrongassumptionremoved.Furthermore,theproposedprotocolprovidesnon-repudiationproofsforanyfuturedisputes.Atlast,analysisoftheatomicityandefficiencyisillustrated.
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