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1. 北京电子科技学院密码科学与技术系,北京100070
2. 西安电子科技大学网络与信息安全学院,陕西 西安 710071
3. 中国科学院信息工程研究所,北京100093
Online First:2020-12,
Published:25 December 2020
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Rongna XIE, Hui LI, Guozhen SHI, et al. Blockchain-based access control mechanism for data traceability[J]. Journal on Communications, 2020, 41(12): 82-93.
Rongna XIE, Hui LI, Guozhen SHI, et al. Blockchain-based access control mechanism for data traceability[J]. Journal on Communications, 2020, 41(12): 82-93. DOI: 10.11959/j.issn.1000-436X.2020232.
为提高数据访问流转控制的透明性、访问流转的可溯源,提出了一种基于区块链的可溯源访问控制机制。所提机制将访问控制策略以智能合约的形式部署在区块链上,通过执行分布式的智能合约实现访问控制策略的评估,确保整个访问授权过程的无中心、透明性和可溯源;采用链下和链上相结合的方式,将客体存储在链下数据服务器,通过客体存储地址和摘要值等信息生成客体索引存储在客体区块链上;日志区块链详细记录了客体访问授权过程和访问过程,任何错误行为都不可修改地记录在区块链上。通过安全性分析,所提机制在保证客体资源隐私性的前提下,实现了访问授权无中心、透明性和可溯源。
To improve the transparency and traceability of access control
a blockchain-based access control mechanism for data traceability and provenance was proposed.The proposed access control policy was transferred to the smart contract and deployed on the blockchain
and the access authorization evaluation was realized by executing the smart contract deployed on the blockchain to ensure the decentralization
transparency and traceability of the access control process.The manner of combining off-chain and on-chain was adopted
the object was stored in off-chain data server
and the object index was generated by the object storage address and hash value
and deployed on the object blockchain.The log of object access authorization and access were recorded in the log blockchain
any misbehavior was immutably recorded.The security analysis show that
the proposed mechanism achieve the properties of decentralization
transparency and traceability while ensuring the privacy of data.
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