【摘要】 顾客想向销售商证明其银行帐户上的钱足以购买某种商品 ,但不愿意泄露她帐户上的钱 ,因此需要一个工具证明一个承诺数在特定的区间内 .目前多数这样的协议要么不能实现完整的证明 ,要么效率较低 .本文给出了一个新的协议 ,协议简单、易于理解 .它能够实现完整的证明 ,其效率比已知的协议更高 .该协议可以用于电子现金、群签名、可证实加密等安全协议设计更多还原

【Abstract】 A buyer wishes to show she has enough money in her account without revealing her money to buy some commodities.Therefore,a tool is needed for proving that a committed number is in a specific interval.Up to now,most of such tools were either inefficient or inexact.In this paper,we present a new simple protocol,which is exact and more efficient than the previous ones.The protocol is suited to be used in electronic cash,group signatures,publicly verifiable secret encryption,etc.更多还原