Design And Implementation Of Blockchain Certificate Storage System

At present,all application systems involve electronic digital evidence.Digital evidence has the disadvantages of high technical dependence and easy tampering,which will cause privacy data leakage,economic loss and so on.Therefore,how to effectively store and obtain evidence and ensure the authenticity,reliability and legitimacy of data has become an urgent problem to be solved.In order to solve the above problems,based on the characteristics of blockchain with traceability,non tampering and decentralization,this paper designs and implements a set of deposit certificate management system.Firstly,according to this paper,the back end of the traditional application system is divided into two platforms: blockchain and application system.The upper application system realizes the black box of the underlying platform of the blockchain by calling the interface of the underlying platform of the blockchain,and solves the problem of difficulty in linking for the traditional application system,and finally realizes the rapid update and transformation of the functions of the application system.Secondly,on the basis of this paper,it introduce to combine Byzantine algorithm with proof of equity to innovate the smart contract,which improves the system fault tolerance and system efficiency;The electronic data of deposit certificate is linked in the form of data table,which optimizes the data query function and improves the query efficiency;It is proposed that files and hash are completely linked,which can synchronize files according to users' personalized needs,avoiding a series of problems such as network congestion.This paper applies the design concept of "blockchain and service" to provide a set of solutions for the transformation of centralized application system into blockchain system.The system test and technical comparison show that the system framework has features:easy deployment,strong extensibility,strong and excellent system performance and easily maintenance,and ensures the integrity and real-time block of the data,which can improve the operation efficiency of the application system so that ensure the privacy and security of the data and reduce the system maintenance cost.