The paper introduces a framework which combines Attribute-Based Access Control (ABAC), blockchain technology, smart contracts, and an upgraded Black-winged Kite (UBK) algorithm to enable fine-grained, decentralized, and tamper-proof geographic spatial data sharing. Access regulations and audit logs are stored on a private blockchain using a Proof-of-Authority consensus mechanism for immutability and transparency. In experiments, the proposed method reduced evaluation policy time by 70% and storage overhead by 52% relative to traditional ABAC, while achieving 98.2% accuracy in access decisions. The performance tests showed that evaluation time and storage increase linearly with scale, supporting large-scale deployment, and the combination of blockchain and smart contracts guarantees secure, auditable, and automated enforcement of access policies without a central authority.
Attribute-Based Access Control for Geographic Spatial Data via Blockchain and Smart Contracts
The framework blends ABAC with blockchain and smart contracts to enable fine-grained, decentralized, and auditable access to geographic spatial data on a private PoA blockchain, featuring the UBK algorithm and strong policy enforcement.
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