A method and system for securely storing large blockchain files

Abstract

The present invention relates to a method and system for safe storage of large files in the blockchain. The safe storage method is as follows: 1) The user of the blockchain node registers the large file in the blockchain, and the storage system splits the large file and stores it in the blockchain. The copy of the large file is redundantly stored in the storage network; 2) The large file is split into N blocks, and the redundancy is K, and randomly stored in M ​​storage nodes; 3) The storage nodes are blockchain nodes and A collection of cloud storage nodes; 4) The user uses the public key to encrypt the file block and the index of the storage location and records it in the blockchain block; 5) After the user logs in to the blockchain at any node, he can use the private key to decrypt the file block and storage location index to recover large files. The invention improves and solves the problem of safe storage and fast synchronization of large files in the block chain, and the system realizes the safe operation of users switching terminals to safely restore large files, and breaks through the limitation of block chain transaction file size.

Description

technical field [0001] The invention relates to a block chain storage method and system, in particular to a block chain large file safe storage method and system, belonging to the field of computer network security. Background technique [0002] Blockchain application scenarios have begun to penetrate into multiple fields, resulting in a large number of applications running on the main chain platform. For the underlying platform of the blockchain, it is not only necessary to greatly improve the performance of high concurrency, transaction confirmation speed, security, etc., but also access to the shared data of the blockchain by various institutions has become a difficulty encountered in the development. In the process of sharing data, reliable data management and secure access control are crucial. Therefore, the demand for distributed storage of large files and large blocks of data is becoming more and more urgent. [0003] Current research and solutions on blockchain and...

AI Technical Summary

Problems solved by technology

One is the method and system for expanding storage on the existing nodes and block space of the blockchain (such as patent 201710139269.1, patent 201711344195.1, etc.), mainly using memory database and disk database to expand the blockchain, single-node disk and Memory cannot accommodate the rapid expansion of large file transactions, so the effect of such methods is positively limited

The second category is the blockchain storage method using multi-level storage (such as patent 201810937197.X, 201810847133.0, etc.), using multi-level storage for capacity expansion, which increases the complexity of system management and the difficulty of scheduling, and is inefficient. The security of storage nodes cannot be guaranteed and stored in the above background; the data fragmentation used is also for parallel processing of blockchain calculations, not to support security

The third category is to use data encryption to increase the security of blockchain files and data storage (such as patent 201811118776.8, system IPFS scheme, etc.), which has high encryption calculation cost and poor scalability

[0004] The blockchain is developing rapidly in the field of data sharing and data transactions. The current blockchain file storage system has great limitations. When facing large file applications, there are problems such as low storage efficiency and high cost.

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