一种基于区块链的数据要素精准授权机制

doi:10.3969/j.issn.0255-8297.2025.04.004

Abstract

Abstract: In the circulation of data elements, different trust domains often adopt independent identity authentication systems and access control standards, making precise authorization for cross-domain access challenging. To address this issue, a blockchain-based precise authorization mechanism for data elements is proposed. This mechanism adopts a collaborative on-chain and off-chain architecture. On-chain, a smart contract-driven dynamic metadata update mechanism for non-fungible tokens (NFTs) is designed, mapping user identities and roles into codable NFTs to enable real-time updates of identity and permissions. Off-chain, a trust evaluation model and a dynamic parsing cache mechanism are deployed to convert user trust values into dynamic authorization evaluation factors, enabling hierarchical and automated permission mapping in heterogeneous trust domains. Experimental results show that the proposed mechanism achieves finer-grained access control, accelerates policy updates, and effectively isolates potential risks.

Key words: data elements, blockchain, non-fungible token, smart contract, trust assessment

CLC Number:

TP302.1

PAN Xuan, ZHANG Kangkang, CHENG Ao. A Blockchain-Based Precise Authorization Mechanism for Data Elements[J]. Journal of Applied Sciences, 2025, 43(4): 600-616.

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A Blockchain-Based Precise Authorization Mechanism for Data Elements

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