一个可审计的离线电子现金方案

An Auditable Offline E-cash Scheme

提出了一个高效率的可审计的离线电子现金方案,用户有权控制去除电子现金的匿名性,即使没有可信第三方的存在。相对于以前提出的可审计电子现金方案,方案的一个优点是银行在查询电子现金的花费者时, 可以直接找到相应的用户帐号,而之前的方法都是从银行的整个提取现金的数据库去遍历搜索,导致效率很低。另一个贡献是构造了第一个多面值的可审计的离线电子现金方案。

Fair tracing is one of the most important aspects in electronic cash （e-cash）. An efficient auditable offline ecash scheme is proposed in which customers have power to control the deanonymization without the third party. The advantage of this scheme is that the bank can directly find the owner when owner tracing is necessary. Another contribution is that an efficient multi-denominations auditable offline e-cash scheme is first presented, in which the bank only needs one private key to issue different denominations.