Block chain data security and privacy protection method for meat traceability
By using layered data storage and differential privacy technology, the problem of protecting sensitive information in meat traceability data on the blockchain is solved, achieving data immutability and privacy security, and providing a data security foundation for the meat traceability system.
Patent Information
- Application Number
- CN202511760301.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-02-13
AI Technical Summary
During the process of uploading meat traceability data to the blockchain, existing technologies struggle to effectively protect sensitive information while ensuring the data remains tamper-proof, leading to risks of trade secret leaks and privacy compliance issues.
A data tiered storage model is adopted, with core verification data stored on the blockchain and detailed business data encrypted and stored in a distributed file system or trusted cloud platform. Data security and privacy are ensured through a differential privacy-based data anonymization and verifiable access control system.
This approach ensures the immutability of data while protecting the privacy of sensitive data and unlocking the analytical value of the data, thus providing a data security foundation for meat traceability systems.
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of blockchain technology and data security, and particularly relates to a blockchain data security and privacy protection method for meat traceability. BACKGROUND
[0002] In the process of uploading meat traceability data to the blockchain, a large amount of enterprise sensitive information (such as procurement cost, supplier information) and personal information are involved. If all the data is stored in plaintext in the blockchain, although tampering can be prevented, there is a serious risk of commercial secret leakage and privacy compliance. Existing solutions either completely disclose all data, sacrificing privacy, or completely store sensitive data offline, weakening the value of the blockchain as evidence. How to achieve fine-grained data privacy protection while ensuring the credibility of traceability data is a major challenge for current industry implementation. SUMMARY
[0003] The present application aims to provide a blockchain data security and privacy protection method for meat traceability, which ensures the traceability data is tamper-proof and verifiable while effectively protecting sensitive data.
[0004] Technical solution: A blockchain data security and privacy protection method for meat traceability, comprising: • Data hierarchical storage model: The traceability data is divided into core verification data and detailed business data. The core verification data (such as data hash, passport ID, key timestamp) is stored on the blockchain; the detailed business data (such as original spectrum, complete enterprise information) is stored in an encrypted distributed file system or trusted cloud platform; • Differential privacy-based data desensitization: For data that needs to be used for macro analysis, apply noise that satisfies differential privacy before exporting, so that the analysis results do not expose the precise information of any single individual or enterprise; • Verifiable permission control system: Based on smart contracts, different data access permissions are set for different roles (such as regulators, enterprises, consumers), and all access records are recorded and auditable.
[0005] Beneficial effects: The present application uses a hierarchical mode of "on-chain evidence, off-chain details", balancing the data's tamper-proof nature and privacy security. Using differential privacy technology, the analysis value of the data is released while protecting individual privacy. Fine-grained permission control ensures that data is used within the scope of compliance, providing a solid data security foundation for the large-scale commercial application of meat traceability systems.
Claims
1. A method for data security and privacy protection of a blockchain oriented to meat traceability, characterized in that, Comprise: Building a hierarchical storage structure of traceability data, storing core data hash for integrity verification on the blockchain, and storing detailed business data containing sensitive information in off-chain after encryption; Using differential privacy technology to desensitize business data for statistical analysis; Through the smart contract to realize a verifiable, role-based data access control system.
2. The method of claim 1, wherein, The core data hash at least includes individual digital passport ID, timestamp of key process node and cryptographic hash value of business data.
3. The method of claim 1, wherein, The differential privacy technology is realized by adding Laplace noise or Gaussian noise to the statistical data.
4. The method of claim 1, wherein, The permission control system defines at least three roles: regulatory party, enterprise party and consumer, wherein the regulatory party has access to all data on and off the chain, the enterprise party can access its own relevant data, and the consumer can only query the traceability summary information of the final product.
5. The method of claim 1, wherein, The off-chain storage adopts the Interplanetary File System or a cloud storage service with permission control.