一种面向区块链的链下数据库高吞吐量可验证查询方法  

High Throughput Verifiable Query Method for Blockchain-oriented Off-chain Database

作　　者：隋源 汪卫[2,3] 邓雪 SUI Yuan;WANG Wei;DENG Xue(Database and Massive Information Processing Laboratory,School of Software,Fudan University,Shanghai 200433,China;Database and Massive Information Processing Laboratory,School of Computer Science and Technology,Fudan University,Shanghai 200433,China;Fudan Innovation Research Institution of Zhuhai,Zhuhai 518057,China)

机构地区：[1]复旦大学软件学院数据库与海量信息处理实验室,上海200433 [2]复旦大学计算机科学技术学院数据库与海量信息处理实验室,上海200433 [3]珠海复旦创新研究院,广东珠海518057

出　　处：《小型微型计算机系统》2021年第6期1304-1312,共9页Journal of Chinese Computer Systems

基　　金：国家重点研发计划项目(2018YFB1403200)资助.

摘　　要：近年来区块链技术受到广泛关注,区块链的应用已经不止局限于加密数字货币,还在溯源、金融、物联网等领域有了初步的应用.传统结构的区块链由于受到共识算法的限制,大量的密码学计算导致网络的事务吞吐量无法得到有效的提升.本文提出一种面向区块链的链下数据库的可验证查询模式,全部的数据按批次存储在链下数据库,区块链中只存储批次数据的消息摘要值,通过这种方式将区块链不可篡改的特性与链下数据库强大的增、删、改、查的能力结合,同时保证了该模式的效率和安全.基于这种模式,本文提出了一种多模式可验证查询方法,根据节点之间信任程度的不同,提供不同代价花费的验证查询方式.在实验的部分采用了Hyperledger Fabric和HBase作为这个模式的实例,通过实验说明了这种模式在系统吞吐量和可验证查询方面有着较好的表现.In recent years,blockchain technology has received extensive attention.The application of blockchain has not only been limited to encrypting digital cash,but also has preliminary applications in traceability,finance,Internet of Things and other fields.Due to the limitation of consensus algorithm,the traditional structure block chain cannot effectively improve the transaction throughput of the network due to a large number of cryptographic computations.This paper proposes a verifiable query mode for the database Off-Chain oriented to the block chain.In this way,the tamper-proof characteristic of the blockchain is combined with the powerful insert,delete,modify and query ability of the Off-Chain database,while ensuring the efficiency and safety of the mode.Based on this mode,this paper proposes a multi-mode verifiable query method,which provides verification query methods with different costs according to the trust degree of each node.In the experiment part,we choose Hyperledger Fabric and HBase as examples of this mode.The experiment shows that this mode has better performance in system throughput and verifiable query.

关 键 词：区块链 链下数据库 可验证查询 Hyperledger FABRIC HBASE 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]