具有有效授权期的代理可分电子现金系统

Proxy divisible E-cash system with finite warrant period

为提高代理可分电子现金分割电子货币的灵活性,减少其通信量和计算量,并使授权人能在授权期后收回代理权,以离散对数的代理签名和离散对数的零知识证明为基础构造了一个新的代理可分电子现金方案。新方案满足一般电子现金的不可伪造,不可重复使用,可以进行货币跟踪和用户跟踪等基本的安全性要求。最后通过分析表明,与基于二叉树分割的可分电子现金相比,新方案在分割支付时采用的简单减法更灵活,通信量和计算量更低。

To increase the flexibility of proxy divisible E-cash system and decrease its communication and computational complexity,and to revoke proxy power after finite warrant period,a new proxy divisible E-cash system based on discrete logarithm proxy signature and discrete logarithm zero knowledge proof is presented.The new scheme satisfies non-forgeability,nonrepeatability,coin tracing and owner tracing that common E-cash possess security requirement.Finally,compared with divisible E-cash system based on 2-node tree partition method,the study shows that the new scheme is based simple subtration partition method and has high efficiency and low communication.