基于可链接环签名的电子消费方案

在当今电子消费系统中,经常出现由于多次消费而导致效率较低甚至金额紊乱的现象,为解决这一问题,提出一种新的电子消费方案。该方案基于双线性对和可链接环签名,运用可链接环签名的高效安全性,能够判断签名正确与否,并检测出同一用户的有限金额是否重复花费的功能,通过取款、消费、存款3个阶段,使消费者、商家及银行三方的交易相互联系,完成电子消费过程。分析结果表明,该方案安全、可行,能实现用户的匿名性及无法重复花费性,满足电子消费的基本要求。与Liu等人提出的方案(Wuhan University Journal of Natural Sciences,2013,No.2)相比,计算成本较低,效率较高。

Electronic Consumption Scheme Based on Linkable Ring Signature

In existed electronic consumption system,multi-consumption often occurs and causes low efficiency even cash disorder. For tackling this trouble,this paper proposes a new efficient and safe electronic consumption scheme. The scheme is based on bilinear pairings and linkable ring signature. Linkable ring signature has the efficiency and the security of ring signature. The scheme can check whether the signature is correct or not. It can detect the same user uses limited amount of cash repeatedly,by the three stages of designing,consuming and saving,connects the transaction of consumers,businesses and banks each other,and makes electronic consumption go on. The scheme can preserve the user＇s anonymity,prevent multiple consuming,and satisfy the basic requirement of electronic consuming. Analysis and proof show that the scheme is more feasible and efficient than the scheme proposed by Liu,etc.（Wuhan University Journal of Natural Sciences,2013,No.2）.