离线的公正电子支付系统

A Off-Line Fair Electronic Payment System

本文使用椭圆曲线加密体制,给出了公开可认证的门限秘密共享协议,构造了一个公正的离线电子支付系统(被动匿名可撤回系统),该系统解决了委托人权力过于集中的问题,且委托人在最初公布其公开密钥后,完全是被动的,不卷入支付协议的实际操作中,只有在被要求时才去掉用户的匿名。

In the paper, a non-interactive publicly verifiable protocol based on elliptic curves cryptography is proposed. It designs a off-line fair electronic payment system （electronic payment system with passive anonymity-revoking trustees）. This protocol solves the power-centralized problem of trustees. After initially publicized their secret key, trustees will be passive, and does not involve in operation of the payment. They would revoke the customer＇ s anonymity if only they were asked.