With the development of electronic commerce, the anonymity of the user on the consumption demand is increasingly outstanding. Electronic cash as a result of this demand arises. In an open network environment, how to protect the integrity, authenticity and integrity of electronic cash transaction has become the focus of current research. This paper mainly discusses electronic cash system based on blind signature. Using RSA blind signature guarantees the system's anonymity. It also analysis the system’s safety, and gives the solution method.
Group signatures allow members of a group to sign messages anonymously on behalf of the group. Only a designated group manager is able to identify the group member who issued a given signature. In this paper we propose a new group signature scheme based on RSA, which is a blind signature algorithm. A multibank E-cash system has been presented based on the proposed scheme. A general design scheme including withdrawal, payment and deposit process is discussed particularly.
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