Block chain data desensitization and traceability storage method and device

Abstract

The invention discloses a block chain data desensitization and traceability storage method and device. The method comprises the following steps: S1, receiving a data storage request which comprises sensitive data and an information association word corresponding to the sensitive data, and the sensitive data is data with access limits between nodes in a channel of a block chain; s2, according to the data storage request, sensitive data associated information associated words are stored and updated in private data corresponding to the nodes, and the private data are data with access permission set in the nodes; and S3, performing hash mapping on the sensitive data to obtain a hash value of this time, forming a modification record of this time by combining the information association word andthe hash value of this time with serialized data associated with the sensitive data, and storing a modification history record corresponding to the sensitive data updated in the private data. The method solves the desensitization problem of the blockchain data and the related traceability problem of the sensitive data, and has the technical characteristics of good privacy protection, traceabilityof the sensitive data and traceability of the modification record of the sensitive data.

Description

technical field [0001] The invention belongs to the technical field of blockchain data storage, and in particular relates to a storage method and device for desensitization and traceability of blockchain data. Background technique [0002] There are many scenarios in real life that have been applied to blockchain technology. Based on blockchain technology in terms of information technology, using its characteristics of unforgeability, traceability, traceability, openness and transparency, and collective maintenance, real life Many functions are not only guaranteed safe and reliable, but also greatly facilitate all aspects of real life. However, in real life, transaction information often carries private information, such as the user's ID card, bank card, and real estate certificate. Such as credential information, such as the purchase price between the procurement department and different suppliers, these private sensitive data are completely different from non-sensitive dat...

AI Technical Summary

Problems solved by technology

[0002] There are many scenarios in real life that have been applied to blockchain technology. Based on blockchain technology in terms of information technology, using its characteristics of unforgeability, traceability, traceability, openness and transparency, and collective maintenance, real life Many functions are not only guaranteed safe and reliable, but also greatly facilitate all aspects of real life. However, in real life, transaction information often carries private information, such as the user's ID card, bank card, and real estate certificate. Such as credential information, such as the purchase price between the procurement department and different suppliers, these private sensitive data are completely different from non-sensitive data such as name, mobile phone number, personal hobbies, etc. Once the sensitive data is leaked or stolen by criminals Using or being known by industry competitors will have serious consequences for individuals or organizations, so sensitive data should obviously be protected in the blockchain

[0003] In traditional information systems, since databases (such as MySQL and other independent and distributed databases) are often used for data storage and operations, it is impossible to store non-sensitive data and sensitive data separately at the data storage level. By restricting the permissions of database users, and storing sensitive data and non-sensitive data in separate tables or even in separate databases, this will increase the complexity of the application, and at the same time, due to the lack of implementation of the application, it is easy to cause exposure of sensitive data, so For the nodes on the blockchain, not all nodes have the protection function of sensitive data, and because the blockchain data is used and stored by all nodes in the blockchain, this does not play a role for the entire blockchain. Comprehensive privacy protection for sensitive data

On the other hand, for blockchain data, the storage of sensitive data needs to be traceable. However, since the same storage method is used for all blockchain data in the existing technology, it is now necessary to protect the privacy of sensitive data. In the case of protection, if the same storage method is used for sensitive data and non-sensitive data, it is obviously not suitable for relevant traceability of sensitive data

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