基于区块链的多级征信数据安全存储与共享系统  

Blockchain-based Multi-level Data Security Storage and Sharing System for Credit Scenarios

作　　者：陈良贵 张益广 邹高 沙大峣 吕智慧[2] CHEN Lianggui;ZHANG Yiguang;ZOU Gao;SHA Dayao;LYU Zhihui(Shanghai United Credit Services,Shanghai 200032,China;Department of Computer Science,Fudan University,Shanghai 200438,China)

机构地区：[1]上海市联合征信有限公司,上海200032 [2]复旦大学计算机科学技术学院,上海200438

出　　处：《软件导刊》2024年第12期150-156,共7页Software Guide

基　　金：国家自然科学基金项目(213202)。

摘　　要：在现阶段的企业信用管理体系中,不同实体间掌握的数据多样并异构,实体间共享数据困难且存在数据孤岛、单点故障与隐私泄露等问题,而区块链因其天然的去中心化和防篡改特性,可很好地解决该问题。因此,基于区块链提出了一个多级征信数据安全存储和共享系统。首先,通过区块链链上和链下存储相结合的方法,实现了多级数据的分类混合存储,解决了区块链的存储瓶颈;其次,提出了一种基于优先级的多级优先队列排序算法,为多级数据提供资源公平、性能优先的排序调度服务,从而提升了区块链服务质量;最后,设计一个细粒度的访问控制策略,通过通道和文件加密解决了IPFS可能存在的文件泄漏问题,并进一步提升了区块链存储文件的安全性和可靠性。实验表明,系统有效解决了传统共享存在的冗余和安全性问题,实现了高效的数据安全存储和可靠共享,且能满足实际应用的性能需求。In the current enterprise credit management system,data held by various entities is both diverse and heterogeneous,leading to significant challenges in data sharing.Compounding this scenario are issues such as data silos,single points of failure,and privacy breaches.Blockchain technology,renowned for its inherent decentralization and tamper-proof characteristics,effectively addresses these challenges.Accordingly,this paper introduces a multi-tiered credit data storage and sharing system based on blockchain technology.Initially,the system employs a combination of on-chain and off-chain storage to achieve multi-tiered,hybrid data storage,thus overcoming the storage bottlenecks associated with blockchain.Subsequently,a priority-based,multi-level priority queue sorting algorithm is proposed.This innovative algorithm ensures equitable resource allocation and performance-prioritized scheduling for multi-level data,thereby enhancing the overall quality of blockchain services.Furthermore,a fine-grained access control strategy is developed.Integrating both channel and file encryption,this strategy effectively mitigates potential file leakage issues in the InterPlanetary File System(IPFS)and substantially improves the security and reliability of blockchain file storage.Experimental results indicate that the system not only effectively resolves the redundancy and security issues inherent in traditional sharing models but also achieves efficient,secure data storage and reliable sharing,all while fulfilling the performance demands of practical applications.

关 键 词：区块链 数据共享 访问控制 数据存储 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]