Blockchain-based methods for protecting medical data privacy and authorizing sharing

By breaking down medical data into cellular units and storing them encrypted, and combining a four-dimensional intelligent authorization model and a TEE trusted execution environment, the problems of data fragmentation, privacy protection, and access control in medical data sharing are solved, achieving secure and efficient cross-institutional data sharing.

CN122133184APending Publication Date: 2026-06-02ANQING VOCATIONAL & TECHN COLLEGE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANQING VOCATIONAL & TECHN COLLEGE
Filing Date
2026-03-02
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies for medical data sharing suffer from severe data fragmentation, difficulty in dynamically balancing privacy protection and data utility, inflexible access control, and difficulty in adapting data authorization to the needs of multiple scenarios. Furthermore, there are technical barriers to cross-institutional collaboration.

Method used

By employing cell metadata unit splitting and encryption, distributed storage, a four-dimensional intelligent authorization model, and a TEE trusted execution environment, we can achieve refined management, dynamic authorization, and efficient sharing of medical data.

Benefits of technology

By constructing a closed-loop logic throughout the entire process, we can achieve secure, controllable, and compliant sharing of medical data, enhance privacy protection capabilities, adapt to authorization requirements in multiple scenarios, break down barriers to cross-institutional collaboration, and ensure data sovereignty and flexibility of use.

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Abstract

This invention discloses a blockchain-based method for medical data privacy protection and authorized sharing, relating to the field of medical data technology. This invention achieves medical data privacy protection and compliant sharing through a four-step closed-loop process. The first step is data splitting and encryption: the original data from the target hospital is split into cell units according to the smallest clinical semantic unit, independently encrypted using the SM4 algorithm, and then differentiated enhancement processing is implemented according to sensitivity to build a strong privacy defense. The second step is storage and evidence preservation: the encrypted units are distributed and stored in fragments, and the fragment hash value, semantic tag, and storage index are uploaded to the shared chain for evidence preservation, simultaneously building a cross-chain gateway and protocol to break down sharing barriers. The third step is authorization and verification: a four-dimensional intelligent authorization model is built to verify requests and generate a temporary key bound to this authorization, achieving precise authorization. The fourth step is usage control: the user decrypts and reassembles the data in a TEE adapted to the cryptographic algorithm, with real-time monitoring of the entire operation and synchronization to both chains, ensuring end-to-end security, controllability, and traceability.
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