Research And Application On Secure Storage Of Log Data Based On Blockchain

With the rapid development of the Internet,enterprise servers generate a large number of log data every day.How to ensure the safe storage of log data in the server is an important problem to be solved urgently.At present,log data storage in most servers relies on centralized log database or local files,and there are potential threats in data security and storage.As an emerging technology,blockchain has the characteristics of tamper-proof and decentralization to ensure the safe storage of data.However,applying blockchain technology directly to log storage has certain drawbacks.On the one hand,due to the small capacity of the block,it cannot meet the storage requirements of massive log data.On the other hand,in log audit,the search time is too long when the timestamp as the query key on the chain.In order to solve the above problems,this paper studies and implements a secure log data storage system based on block chain.The main research contents are as follows:(1)Aiming at the problem of secure storage of log data,a new log data storage architecture is proposed combining blockchain technology and IPFS.The architecture uses cryptography techniques such as encryption and decryption algorithm and digital signature to ensure the secure storage of log data,and solves the problem of insufficient capacity and throughput of storing massive log data on block chain by the combination of on-chain storage and off-chain storage.(2)Under the condition of using time stamp as query key in log audit,a new block structure design scheme is proposed to solve the problem of excessively long retrieval time.In this scheme,new fields are added to block headers,Merkle trees in block bodies are improved and security analysis is performed.While ensuring the security of transaction data,it improves the speed and efficiency of data retrieval on the chain.(3)According to the storage architecture and improved block structure proposed above,a log data storage system based on block chain is implemented.The system ensures the safe storage of log data,solves the problem of small block capacity,and users can query logs quickly through time stamps.Simulation experiments show that the block structure designed in this paper has certain advantages in query speed and efficiency compared with the traditional block chain scheme.In conclusion,this paper studies the log data storage architecture and block structure,and implements the blockchain log storage system and simulation experiments.The system designed in this paper has the characteristics of high security,high capacity,high retrieval efficiency and so on,and provides a new solution for the secure storage of log data based on blockchain.