In this paper, we introduce a notion called restrictive blind group signature, then we construct a fair off-line e-cash system in the multiple bank model with both user and bank anonymity control.
本文提出一个新的称为限制性群盲签名的概念，并且指出了如何利用限制性群盲签名来构造多个银行参与发行的、公正的电子现金系统。
The concept of off line electronic cash is briefly discussed, and a new electronic cash scheme based on RSA blind signature and quadratic residuosity is proposed.
讨论了离线电子现金的概念 ，并在 RSA盲签名和二次剩余的基础上提出了一种新的电子现金方案 。
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