Fine-grained access refers to highly specific control over resource permissions and data visibility. This security mechanism allows administrators to define precise rules determining who can access what specific parts of a system or data set, and under which conditions. Instead of broad permissions, it grants privileges at a granular level, such as individual files, database columns, or specific functions within an application. This approach significantly enhances security by minimizing the principle of least privilege.
Context
In the realm of digital assets and blockchain, fine-grained access control is crucial for enterprise blockchain implementations and privacy-preserving protocols. It addresses the need for selective data disclosure in permissioned ledgers or for managing sensitive information in decentralized identity systems. News often highlights its importance in regulatory compliance, where specific data access policies are mandated for financial reporting or personal data protection.
A novel Attribute-Based Encryption scheme offloads decryption to the cloud, ensuring verifiable, auditable, and privacy-preserving data access on blockchain.
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