| Summary: | 碩士 === 國立中興大學 === 資訊科學研究所 === 91 === Due to the rapid development of the Internet, electronic commerce has become more and more popular. Many payment systems have been proposed. However, a secure, efficient and convenient electronic payment system is still desideratum. There are four kinds of payment systems, namely e-wallet, credit card e-cash and e-check. The first two systems need to transact through secure electronic transaction systems. However, the cost of building the system is expensive. When it comes to e-cash, it existes some general problems after surveying related works. For these reasons, we used e-check in our scheme based on proxy signature. The scheme introduces smart card to make the payment system portable, secure and convenient. The system allows the merchant to check how much the face_value remains in consumer’s e-check. During each transaction, the consumer does not need to contact the bank’s sever. In addition, this scheme applies proxy deposit protocol in order to decrease the flow of transmission and the steps of verification.
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