Brands电子现金系统为防止重复使用电子现金,主要通过查询银行存储的电子现金数据来识别重复花费的用户,极大地增加了银行服务器的数据存储量和查询负载。把电子现金的提取时间嵌入到电子现金以及银行对电子现金的签名中,只需要存储未过期的电子现金数据,这样大大地减少了银行存储的数据量,并且按照提取时间进行数据库索引,可以有效地提高数据查询效率,较好地解决了银行瓶颈问题。 Brands e-cash system to prevent duplication of electronic cash, mainly through the bank e-cash data stored to identify the user repeatedly spent, which greatly increased the bank server data storage and query load. Embedding e-cash extraction time into e-cash and the bank’s signature of e-cash only requires storing unexpired e-cash data, which greatly reduces the amount of data stored by the bank and is indexed by the database at the time of extraction Improve the data query efficiency, a better solution to the bank bottleneck problem.