基于属性加密的混合存储区块链文件系统的研究与实现

s a decentralized and immutable distributed ledger technology, blockchain technology has many applications in the fields of medical care, traceability, and storage. In the field of data storage, blockchain-based storage systems can significantly improve data security, transparency, and tamper resistance through multi-node distributed storage and cryptography technology. This paper deeply studies the status and challenges of distributed storage schemes, and proposes a hybrid storage blockchain file system based on attribute encryption. The system comprehensively considers the size of the file data and the characteristics of the blockchain, and adopts a hybrid storage method to solve the problems existing in the current scheme. The storage burden of the blockchain is effectively reduced by storing large-scale file data in an off-chain storage system. At the same time, Ciphertext-Policy Attribute-Based Encryption (CP-ABE) technology is introduced. In this way, the security and privacy of the system are enhanced. Experiments show that the scheme proposed in this paper can effectively reduce the size of the data on the blockchain, and also has better performance in comparison with other papers of the same type.