几种电子现金方案的构建与分析

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1、南开大学博士学位论文几种电子现金方案的构建与分析姓名：李楹申请学位级别：博士专业：概率论与数理统计指导教师：陈鲁生;符方伟20090501摘要有优势．我们利用陈晓峰等提出的双线性对上的限制性部分盲签名构造了‘一种在／离线用户透明的电子现金方案，方案根据用户的信誉值决定采用在线支付还是离线支付，在／离线的选择对支付用户是透明的．4．构造了一种离线的电子保付支票方案，实现了物理保付支票可精确花费等优点．借助可证明随机函数实现了可以一次提取多次消费的电子支票簿，大大提高了系统的效率，借助短签名降低了系统通信和存储代价，借助“观察者”实现事前

2、避免重复消费，方案在CDL假设和q．DBDHI假设下是安全的．5．引入顺序图描述安全协议，提出实体框架模型分析电子现金协议．通过实体框架，可以确定协议各参与方以及敌手的能力、明确匿名性等安全特性的语义含义，清晰地对电子现金这种复杂协议进行形式化分析．关键词电子现金电子支付安全协议Abstract__-——————————————————————————————————————————一Withthedevelopmentofnetwork．theadvantageofe-commerceisincreasinglyobvioUS．Be

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