{"title":"IAP: Instant Auditing Protocol for Anonymous Payments","authors":"Ping Zhong, Bo Wang, Anning Wang, Yiming Zhang, Shengyun Liu, Qikai Zhong, Xuping Tu","doi":"10.1109/ICPADS53394.2021.00074","DOIUrl":null,"url":null,"abstract":"Blockchain(e.g., Bitcoin) has widespread use in digital currency, which is entirely public to all participants, revealing users' privacy and transaction details. Anonymous blockchains without auditing capability can offer strong privacy guarantees, they could be used by illegal activities. However, anonymous blockchains with auditing capability suffer from two limitations: (i) inefficient auditing capability; (ii) lower degree of decentralization. To address these problems, this paper presents IAP, an instant auditing protocol based on anonymous blockchain with strong anonymity guarantees, which uses audit node cluster to implement decentralized instant auditing. The experimental results show that IAP only needs 60 milliseconds to complete an audit on average with 16 audit nodes, which accounts for one thousand of a complete transaction time. IAP can still complete efficient auditing when there are more than half of the nodes are honest in the audit node cluster. Moreover, its performance is virtually unaffected by increased number of transactions.","PeriodicalId":309508,"journal":{"name":"2021 IEEE 27th International Conference on Parallel and Distributed Systems (ICPADS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE 27th International Conference on Parallel and Distributed Systems (ICPADS)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICPADS53394.2021.00074","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract

Blockchain(e.g., Bitcoin) has widespread use in digital currency, which is entirely public to all participants, revealing users' privacy and transaction details. Anonymous blockchains without auditing capability can offer strong privacy guarantees, they could be used by illegal activities. However, anonymous blockchains with auditing capability suffer from two limitations: (i) inefficient auditing capability; (ii) lower degree of decentralization. To address these problems, this paper presents IAP, an instant auditing protocol based on anonymous blockchain with strong anonymity guarantees, which uses audit node cluster to implement decentralized instant auditing. The experimental results show that IAP only needs 60 milliseconds to complete an audit on average with 16 audit nodes, which accounts for one thousand of a complete transaction time. IAP can still complete efficient auditing when there are more than half of the nodes are honest in the audit node cluster. Moreover, its performance is virtually unaffected by increased number of transactions.
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IAP:用于匿名支付的即时审计协议
区块链(例如比特币)在数字货币中广泛使用,对所有参与者完全公开,暴露了用户的隐私和交易细节。没有审计能力的匿名区块链可以提供强有力的隐私保证,它们可能被非法活动所利用。然而,具有审计能力的匿名区块链存在两个限制:(1)低效的审计能力;(二)权力下放程度较低。为了解决这些问题,本文提出了基于匿名区块链的即时审计协议IAP,该协议具有强匿名性保证,利用审计节点集群实现去中心化的即时审计。实验结果表明,IAP在16个审计节点上平均只需60毫秒即可完成一次审计,占一次完整事务时间的千分之一。当审计节点集群中有超过一半的节点是诚实节点时,IAP仍然可以完成有效的审计。此外,它的性能几乎不受事务数量增加的影响。
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