| Summary: | 碩士 === 元智大學 === 資訊工程學系 === 90 === We propose a payment system based on electronic cash payment system that can offline transactio,avoid double spending immediately,transfer e-cash to other,transfer encrypted data safely to other and store privated data safely in smart card.Our system is different from proposed payment systems.it is very sample and safe.
In our system,we store private data and encryp/decrypte data in smart card.When merchant get e-cash from user,merchant don’t need send bank then.Merchant can validate e-cash himself and can reduce bank’s load,communication time delay.Using our system,we can transfer valuable information from one to another face to face and can transfer valuable information via network.
Our system can avoid double spending immediately because we design a good mechanism during transaction.It is very important that we get transaction result correctly when finishing transaction.Therefore,we also design a protocol that can’t break （transaction result correctly）during transaction.When merchant get much money,he can use on-line transaction by assigning.Our system is more flexible.
Offline transacion,avoiding double spending immediately and atomization are the most specific features in our system.this features is very important to payment systems.Because past papers didn’t discuss this features altogether,we research and propose the solution to problem exhaustively in our system.Our system,Off-line Electronic Cash Payment System Based on Smart Card,is an other way for past payment systems.
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