基于智能合约的双链数据共享系统  

Double-Chain Hybrid Data Sharing System Based on Smart Contract

作　　者：梁茹锦 于刚[1] 陈才军 LIANG Rujin;YU Gang;CHEN Caijun(Information Engineering University,Zhengzhou 450001,China;CLP Great Wall Internet Security Technology Research Institute(Beijing)Co.Ltd,Beijing 100000,China)

机构地区：[1]信息工程大学,河南郑州450001 [2]中电长城网际安全技术研究院(北京)有限公司,北京100000

出　　处：《信息工程大学学报》2024年第1期120-126,共7页Journal of Information Engineering University

基　　金：河南省重大公益专项资助项目(201300210200);河南省网络密码技术重点实验室开放基金资助项目(LNCT2019-S01);河南省食品安全数据智能重点实验室开放课题(KF2020YB04)。

摘　　要：为解决传统数据共享模式下数据存储于中心、权限集中于中心带来的单点故障、单点攻击、访问控制不灵活等问题,基于区块链上智能合约设计了一种双链混合架构的新型数据共享系统:系统通过星际文件系统(InterPlanetary File System,IPFS)实现数据分布式存储,解决了数据中心化存储带来的单点故障、单点攻击的问题;通过联盟链和私有链双链混合的方式,利用区块链不可更改的特性保护数据不被非法篡改;通过链上智能合约实现数据的灵活共享和访问可控,访问记录透明可追溯,解决了传统数据中心非法授权等恶意行为无法监管的问题。In the traditional data sharing model,the data is stored in the central server and authority is centralized to the center server,generating the problem of single point of failure,single point attack,poor data security,and restricted access control.To solve the above-mentioned problem,this paper designs a new double-chain hybrid data sharing system based on the smart contract on blockchain.The system implements distributed data storage through the InterPlanetary File System(IPFS),which solves the problem of single point of failure and single point of attack caused by centralized data storage.With the combination of the consortium blockchain and the private chain,the data is protected from illegal tampering utilizing the immutable property of blockchain.Through the smart contracts deployed on the blockchain,the system authenticates user identity,sets data access policies,and achieves flexible data sharing and access control.The system access records are transparent and traceable,solving the problem that traditional center server illegal authorization and other malicious behavior can not be monitored.

关 键 词：区块链 数据共享 智能合约 访问控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]