一种新的电子货币系统

A new kind of electronic cash system

在电子货币系统中，用户首先产生若干个密封的电子货币，银行打开其中的一些以检查它们是否有效．如果打开的都有效则为某个未打开的签字．文中用概率的方法提出了一种分割选择技术，银行打开用户密封的电子货币的数目由一概率决定，然后基于这种分割选择技术提出了一种新的电子货币系统，并分析了系统的安全性．

In an electronic cash system, many sealed bills are first generated by a user, and the bank opens up some of them to check whether they are valid. If there are no mistakes, the bank signs on a bill that hasnt been opened yet. In this paper, a cut and choose technique on probability is presented, with the number of the bills that can be opened by the bank determined by the probability. Then a new kind of electronic cash system based on the cut and choose technique is given, and its security is analysed.