Mobile E-Cash Protocol Based On ECC And Limited Blind Signature

E-commerce is a new form of business. Its emerge increases the opportunity of bushiness communication, decreases business costs, simplifies business flows, improves business efficiency. The remarkable characters of e-commerce are high efficiency and low cost. In the business process, there are funds exchange among consumer, shopper, enterprise and bank, which can be achieved by payment protocol. Payment protocol must ensure security and secrecy of information transmission, thus security and efficiency are main aspects of e-commerce. In each e-commerce technology, e-cash technology is an important research aspect, because it can protect user's privacy perfectly, and can make customer do some shopping with anonymity. With the development of wireless communication technology, people pay more attentions to m-commerce in e-commerce. It is convenient, simple, portable and popular. This text does some researches on m-commerce protocol in it.Firstly, this text analyses atomicity and anonymity of the m-commerce protocol which is proposed by Fu xiaoqing. And a high efficient limited blind signature scheme and elliptic curve cryptography arithmetic is united to form a high efficient limited blind signature scheme based on elliptic curve cryptography arithmetic. The scheme is imported into the process of creating e-cash to enhance the anonymity under control. At the same time the atomicity of the protocol is certificated by using the method in database which is used to prove the atomicity of affair. On this basis, a new protocol and each sub protocol of it are put out, including initial sub protocol, the opening account sub protocol, the withdrawing sub protocol, the paying sub protocol, the depositing sub protocol and the tracing sub protocol. Finally, the protocol is analysed.Secondly, this text analyses the safe mode of the WAP gateway. A problem named WAP gap is found in it. The problem is improved, and the public key encryption arithmetic and the symmetry key encryption arithmetic are united to form a complex arithmetic. On the basis of the complex arithmetic, a solution to the problem is constructed. Then the solution is analysed.Finally, a system structure of m-commerce system is constructed. This system structure is analysed from security and efficiency in addition.