Research And Implementation Of A Blockchain MPT Index Optimization Based Title Declaration And Evaluation System

The forgery of title certificates is not conducive to correcting the social atmosphere,and the traceability of title certificates is a key issue to be solved in the field of title evaluation.The traditional title evaluation relies on a certain enterprise organization to run,and the system and the security of data rely excessively on the centralized server.If the centralized node fails,the whole system cannot operate normally and the query efficiency of the system is seriously affected.By adopting blockchain technology,once the data is chained,it has the characteristic of non-tampering,and the flow and authenticity of data are more reliably guaranteed,which has great development potential in the field of traceability and anti-counterfeiting.This paper combines blockchain technology with the traditional title evaluation system to better guarantee the validity and traceability of each title certificate.The research contents of this paper are as follows:Firstly,the blockchain MPT structure is improved to improve the query efficiency,and the account business tree ABT and unit business status tree UBST are added to the MPT structure.ABT binds individual account and business in the block structure,so that the reporting users can query the historical reporting business data,the latest status of current reporting business,and the traceability can be done faster according to this tree when tracing.UBST records all the evaluated operations of the institution and supports global query and branch query,so that the personnel of provincial and municipal title offices and other units can query the data to be evaluated or evaluated by the institution or unit more quickly.Secondly,blockchain technology and SHA256 encryption algorithm are adopted to store and encrypt the title declaration data to further enhance the security of the system.By combining blockchain with the title evaluation system,the title data entered by the user when declaring includes text information and file information,the text is encrypted with SHA256 to get 64-bit hexadecimal cipher;the file is uploaded to the interstellar file system,and finally the two cipher texts are stored in the traditional database and blockchain respectively.This data storage design ensures that the information and documents filled by the filing user are not tampered with.Finally,after combining blockchain technology with the title declaration and evaluation system,the efficiency of query and traceability is verified.Based on the optimized functions of account creation and management of the title evaluation system,the module of declaration data filling by the declarant,the evaluation of the declaration business by the evaluator,and the traceability and anti-counterfeit inquiry of the title certificate,the query and traceability experiments were conducted,and the experimental results showed that the index structure with ABT and UBST added only increased the construction time by 1.56% on average compared with the blockchain structure without index structure.The average increase in build time is 1.56% and the average increase in on-chain data volume is 1.2%.For the local data volume,the indexed structure is 3.4 times larger than the non-indexed structure due to the additional indexing structure.Compared to the ABT index,the query time of the global index UBST is reduced by 99.8%.Further,compared to the global UBST index,the query times for the UBST8 and UBST14 branch indexes are reduced by4.34% and 11.9%,respectively.This paper uses distributed,tamper-proof and traceable blockchain technology to optimize the title declaration and evaluation system to help create a more credible government system.