基于代理的密码货币支付系统  

Proxy-cryptocurrency payment system

作　　者：傅晓彤[1] 陈思[1] 张宁[1] FU Xiao-tong;CHEN Si;ZHANG Ning(Institute of Network and Information Security, Xidian University, Xi’an 710071, China)

机构地区：[1]西安电子科技大学网络与信息安全学院,陕西西安710071

出　　处：《通信学报》2017年第7期199-206,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61402351);教育部留学回国人员科研启动基金资助项目(No.BK16015010002);"111计划"基金资助项目(No.B16037)~~

摘　　要：利用区块链技术实现的去中心化的密码货币被誉为有史以来最成功的密码货币。用户以公钥作为账户地址,使交易具备匿名性,即隐私的可保护性。然而区块链上记录的交易信息,会给用户隐私带来潜在的泄露威胁;此外,为了防止重复花费,系统约定只有在目标区块之后又有k个后续区块产生才能确认该目标区块上的交易是有效的,这段等待后续区块生成的时间较长,大大降低了交易效率。针对以上问题,提出一种基于代理的密码货币支付系统模型,并给出了基于盲签名算法的实现方案,通过在支付阶段引入代理,缩短了交易确认时间,提高了交易效率,同时,更好地实现了用户的匿名性即隐私保护功能。The decentralized cryptocurrency which was based on block chain has been thought the most successful one in history.In the system,public keys were used as the users’accounts which guaranteed the anonymity in real transactions.However,all the transaction information was recorded in the block chain,it was a potential threat for users’privacy which might leak the payment information.Moreover,to avoid double-spending,it was agreed that the transaction on the target block was valid only if another k blocks were generated after the target one.The long waiting time reduced the efficiency of the payment system.A model of payment system based on a proxy-cryptocurrency was proposed,and a solution based on blind signature techniques was proposed.The scheme introduced a proxy in the payment phase,by which transaction confirmation time could be reduced and the transaction efficiency could be improved.Meanwhile,the system implements better anonymity,namely as the privacy protection function.

关 键 词：密码货币 区块链 盲签名 匿名性 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]