| 摘要: |
| 数据已成为企业的重要资产.如何在企业内部对数据的访问权限进行有效控制、在企业之间安全共享数据一直是一个挑战.区块链中的分布式账本可以从某些方面解决上述问题，但是区块链所应用的非对称加密机制仅可进行一对一的安全传输，并不满足企业内部复杂的访问控制要求.提出一种应用区块链的数据访问控制与共享模型，利用属性基加密对企业数据进行访问控制与共享，达到细粒度访问控制和安全共享的目的.通过对比分析，该模型在安全性和性能上较好地解决了企业内部访问权限难控制、企业之间数据难共享的问题. |
| 关键词: 区块链 平行区块链 属性基加密 访问控制 数据共享 |
| DOI：10.13328/j.cnki.jos.005742 |
| 分类号: |
| 基金项目:国家重点研发计划（2017YFB1400700）；国家自然科学基金（U1509214） |
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| Model for Data Access Control and Sharing Based on Blockchain |
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WANG Xiu-Li, JIANG Xiao-Zhou, LI Yang
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School of Information, Central University of Finance and Economics, Beijing 100081, China
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| Abstract: |
| Data has become an important asset for an enterprise. How to effectively control access to data within an enterprise and securely share data between enterprises have been a challenge. Distributed ledger in blockchain can solve these problems in some ways. However, the asymmetric encryption mechanism applied by blockchain can only be transmitted peer to peer securely; it does not meet the complex access control requirements within the enterprise. This paper presents a model for data access control and sharing using block chain, and uses attribute based encryption to control and share enterprise data, so as to achieve the purpose of fine-grained access control and secure sharing. Through comparative analysis, the model can solve difficulties ofaccess control withinthe enterprise and sharing data between enterprises in security and performance. |
| Key words: blockchain parallel blockchain attribute-based encryption access control data sharing |
