Abstract: According to the current situation of personnel file management in China,this paper puts forward a scheme of personnel file management system based on blockchain,and introduces the improved PBFT consensus algorithm and system scheme design from the system framework.The system uses the improved PBFT consensus algorithm to store the file data safely and effectively in the personnel file blockchain system,which ensures the traceability and effectiveness of the file data and uses technologies such as intelligent contract and inter planetary file system (IPFS) to realize the local backup and transfer sharing of personnel files,so as to prevent the malicious damage of the file data by the untrusted third party and ensure the security of the system.Experimental data show that the improved PBFT consensus algorithm has obvious advantages in output performance,consensus speed and security compared with other mature consensus algorithms,provides higher security and throughput.Experimental analysis shows that the personnel file management system based on blockchain is expected to change the disadvantages of traditional personnel file management to meet the growing demand of personnel file data protection and sharing.

Key words: Blockchain, Consensus algorithm, Digital archives, Inter planetary file system, Smart contract