A blockchain data privacy access control method and system
By combining layered identity encryption and homomorphic encryption technologies with smart contracts, the problems of key management and efficiency of hierarchical access control in blockchain data privacy access control are solved, achieving fast and secure permission management and data privacy protection.
Patent Information
- Application Number
- CN202610681530.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing blockchain data privacy access control schemes suffer from problems such as complex key management, insufficient anonymity, low efficiency of hierarchical access control, and limited fine-grained flexibility, which cannot meet the needs of complex multi-level permission scenarios.
It employs layered identity encryption and homomorphic encryption technologies, combined with smart contracts. System parameters and keys are generated through a root key generation center. A hierarchical key chain with progressively authorized permissions is constructed using a key delegation algorithm. Access control is achieved by combining a decentralized identity directory and smart contracts on the blockchain. Encryption is performed off-chain, while evidence is stored and verified on-chain.
It achieves constant ciphertext size, fast key delegation and hierarchical authorization, supports homomorphic encryption computation, improves system security and performance, is suitable for multi-level permission scenarios, and reduces the impact on blockchain performance.
Smart Images
Figure CN122419923A_ABST